Add a button from microfinance site Tipjoy.com to your Facebook page, blog or Web site to let your fans tip you for entertaining them. Or encourage your Twitter followers to text-message you some coin: Tipjoy tracks payment "tweets" (usually a dollar or so) and transfers the money via PayPal.
Become an agent for the KGB—the Knowledge Generation Bureau — at kgb.com. Inquiring minds text questions (say, "What are hot dogs made of?") to 542542 (kgbkgb), which are relayed to agents online. You do some digging, send back a quick, accurate response, and pocket a cool dime each time.
Put your dot-com cleverness to use at Pickydomains.com, where clients who are launching a Web site for a new company pay $50 to garner suggestions for a domain name. If they register your idea, you get half the fee.
Rate and review songs on U.K. site Slicethepie.com, and your opinions will earn you up to 20 cents from the site’s managers for each write-up. Or contribute software reviews to Softwarejudge.com, which shells out at least a buck apiece. Reviews the site deems “damn good” can bring in $50.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.