There are hundreds of stories about ambitious people who quit their jobs to start businesses in their garages, worked 80-hour weeks, sold their companies and wound up rich. This isn't one of them.

Instead, this is about the growing number of average people who are spending their leisure hours selling hobbies and services on home computers and the Internet. With full-time salaries stretched thin and the cost of necessities rising, more people are looking for low-risk ways to earn extra income.

"The Web is a great place to shop and spend money, but it's pretty great for making money too," says Joanne Pratt, a Dallas-based adviser to the Small Business Administration on at-home commerce.

More than half of all small businesses are based at home, according to the SBA. "Computers, Internet access, cell-phone technology and simplified web-page design software have all become cheaper and faster in recent years, making it easier to launch some type of at-home enterprise without sinking a lot of money into it," says Simon Yates, senior analyst at Forrester Research.

Most people who run an at-home business use a desktop computer, connect to the Internet and live in a household where the average annual income is $65,000, reports Forrester. To manage the extra cash, many entrepreneurs are using accounting software programs for small businesses, such as Intuit's QuickBooks line, which generated revenue of $654 million last year -- a jump of nearly 100 percent since 2000.

"If you're the slightest bit entrepreneurial, you can reach large numbers of consumers instantly over the Internet, while key-word searches at Google let consumers reach you just as quickly," says Pratt. "The Web is an amazing marketplace." How can you turn your PC into a cash machine? It's easier than you think:

Auction Stuff on eBay

In New York, where trend-conscious executives and socialites routinely clear out cramped apartment closets to make room for newer looks, Bonnie Levine is considered something of a personal seller. Think Carrie Bradshaw in reverse. When the Manolo Blahniks and Pradas have to go, Levine gets a call to pick them up.

At home, Levine, 41, and her partner, Mindy Calo, 34, auction off the shoes, designer clothes and accessories on eBay, taking 50 percent of all sales. "We're both moms and our husbands work full-time," says Levine. "We do this to earn extra money between family chores, not to get rich quick."

Levine and Calo devote about 20 hours a week to their e-enterprise, and each pockets about $3,000 a month. The idea for the business came to Calo in 2003 when she auctioned off some of her own clothes. Soon Calo and Levine were doing the same for families and friends nationwide, using the eBay seller name Mindycara. In fact, there are now more than 50,000 "trading assistants" registered with eBay to help people auction off their goods.

"Both of us knew high-powered women with great taste, and they told other women, who told their circle of friends," says Levine. Now the pair has 20 regular clients.

In addition to sorting through clothes, Levine and Calo snap digital images, write up descriptions, determine market values using andale.com, post the information on eBay, and ship merchandise to winning bidders.

To avoid paper clutter, they use channeladvisor.com, a virtual office that stores images, e-mails and documents they don't want to print out or can't afford to lose in a computer crash.

Levine and Calo's advice: Focus on satisfying your customers. "If you have a '500' positive feedback rating," says Calo, "you're much more likely to be viewed as reliable and trustworthy, which counts for everything on eBay."

Blog for $$$

When he's not teaching Internet and constitutional law full-time at the University of Tennessee, Glenn Reynolds, 44, can be found "blogging" on his computer.

Reynolds, creator of the conservative instapundit.com, is one of a growing number of bloggers (blog is short for web log) who post commentary, reviews, photos and more on a wide range of topics on websites throughout the day. Imagine a cyberspace soapbox, and you get the idea.

Blogging is something of a Seinfeld experience -- enabling anyone with a website to write about nothing and everything on a regular basis and receive feedback from readers. What did you do today? That's a blog. What do you think about today's headlines? That's a blog too. How's your pet chinchilla doing? Another blog. "It's like your own printing press, without having to worry about paper, ink or postage," says Reynolds.

Technorati.com, a San Francisco-based real-time search engine that tracks web logs, estimates that 12,000 new blogs are created each day. They range from engadget.com, which features consumer electronics news and reviews, to boingboing.net, with posts on everything from spring-loaded women's shoes to novelty records.

To attract and hold a large, well-defined audience that advertisers will want to reach, a blogger needs a strong point of view, an engaging writing style and a gift for smart analysis. Reynolds says his site receives up to 500,000 visits daily and earns income -- $3,000 a month -- through contributions and posted ads.

"I put a tip jar on my site in 2002 after a friend suggested it," he says. "I thought it was a dumb idea, but I earned $1,300 in the first few days."

Last year, instapundit.com generated so much daily traffic that blogads.com, an Internet ad-sales company, convinced Reynolds to accept ads on his site. Blogads.com takes 20 percent of the fee paid by advertisers.

Reynolds devotes two to three hours a day -- between classes and at night -- writing entries and reviewing upward of 200 e-mails. "When your site generates enough buzz, you start getting great links and opinions from others that you can post," says Reynolds. "At this point, my site is almost a group blog with a strong editor."

Does Reynolds dream about giving up teaching and blogging full-time? "This is just a hobby, not my life's work," he says. "The only difference between this and my other hobbies, like scuba diving, is that blogging makes a little money." Reynolds's advice: Keep it fresh "so your audience will keep coming back."

Forecast the Future

Emily Galash's friends are so jealous. The 16-year-old Portland, Oregon, high school sophomore is paid $125 a month to take digital photos of teen culture and send them to Look-Look, a youth-culture marketing and trend-forecasting firm in Hollywood.

Galash is one of Look-Look's 35,000 teen trendspotters worldwide who feed their network inside information about the ever-shifting tastes of the lucrative youth market. The demand for hip, sharp-eyed trendspotters is growing as companies and consultancies attempt to learn more about what makes teens buy.

Some of Look-Look's corporate clients, such as Virgin Mobile, a cell-phone service provider, use the images on their websites to give pages an authentic teen feel. Which is why Galash's subjects must first agree to be photographed and then sign a release before she can upload their images to look-look.com.

Galash was offered a shot as a trendspotter last August, when her cousin gave up the job. Known at Look-Look as a "photojournalist," Galash finds her best subjects at school, in the park, at local malls and near the city's many music clubs. "It's getting more difficult to capture original styles because so many young people work hard to stand out," says Galash. "You have to be able to spot the difference between someone who's copying trends and someone who's truly inventing a new look."

Galash's advice: Develop your communication skills and intuitive feel for that next cool thing. But remember that "schoolwork comes first."

Sell Your Hobby

Stephanie Sorbel is one of only a handful of Kyle, South Dakota, residents who own a computer. She's also one of only a few members of the Oglala Lakota tribe on the Pine Ridge Reservation who sell traditional clothes and crafts on the Internet.

Word-of-mouth sales from Sorbel's site (lakotamall.com/lakotadreams) bring in an extra $1,500 a month, which along with her and her husband's full-time salaries goes to support their four children.

Sorbel taught herself to use the computer and navigate the Internet after her Marine husband bought her a PC in 1997 to e-mail him while he was stationed in California. When her mother suggested she sell her crafts on the Internet, Sorbel applied for a low-interest loan from the Lakota Fund, which helps businesses develop on the reservation. Then Sorbel was able to hire a website designer and pay a hosting service. "People don't realize how many funds there are that can help you start a website," says Sorbel, who now works as an office manager for the fund.

Sorbel made her first online dollar in 1999 when a craft shop commissioned a traditional cradleboard for $800. "They sold it right away and immediately asked me to make a doll and other items," she says.

Using traditional 18th-century techniques passed down to her by tribal members, Sorbel decorates clothes by pressing porcupine quills flat and hand-sewing them, using deer or buffalo tendon.

Time management is key. "After we eat dinner each night, I work on my projects in the same room where my children are doing their homework," she says. "When they're done, my 12-year-old daughter helps with the beadwork, while the others put hair on the beaded dolls."

Sorbel works on several projects simultaneously. The men's powwow dance leggings ($1,500) she's completing will take a couple of months, while the $700 doll of Standing Bear, one of her husband's ancestors, will require weeks. Sorbel's advice: Be sure visitors to your site don't have to hunt to find a phone number or e-mail address for you. Feature up-close images of your products. Most important, she says, "Never over-promise customers, and always be honest about what you can and can't do within their time frame."

Troubleshoot PCs

After years spent fixing their kids' computers, Donna Gaynor and Maria Luskin decided they could earn extra income doing just that for people in their San Diego neighborhood. So they took classes to become certified through the Computing Technology Industry Association (comptia.com), an international IT trade organization.

In 2002, Gaynor and Luskin formed PC Divas, a mini-business that brings in about $3,000 a month. They try to work no more than 20 hours a week -- usually from 10 a.m. to 2 p.m. while their teenage children are in high school.

"We called ourselves PC Divas so we'd always remember that this is a side venture and that we have families and lives," says Gaynor, laughing. They have about 250 clients, charge $75 an hour, and limit repairs to computers within a 10-minute radius of their homes.

A growing part of their business is diagnosing problems remotely -- provided the client has Windows XP. With the client's permission, Gaynor and Luskin use software that lets them see the customer's desktop from their home computer and even control the client's mouse to resolve problems.

"We have a client in his 70s who regularly calls to say he can't find a file or that his computer is acting strange," says Luskin. "I connect to his PC while he's sitting in front of it, and I use his cursor to show him what's wrong or where a file is located. It freaks him out a little -- it's like watching a piano play by itself -- but we're on the phone together and he trusts me."

Gaynor and Luskin's advice: Review a service contract from a major computer-repair company and use it as a model. Then have a lawyer draw up a tailor-made contract that advises the customer of the risk to his data and limits your responsibility to the agreed-upon repair. It should also specify a time limit to any guarantee of your work. "We make our own schedules; we work only a few hours a day and provide good service," says Gaynor. "We're computer divas."