Mechanical Turk: Amazon's Mechanical Turk is a resource for doing human-intelligence tasks, or as the site commonly refers to them, HITs. You get paid a very small fee for any given HIT and you'll need a good deal of volume to make a substantial amount of money. But it is a resource you can use in your spare time to generate a small income online.
Although the demand is expected to decrease over the next decade, the opportunities are still there for travel agents who can harness the Internet to earn clients and help them plan their adventures. According to the BLS, job prospects may be best for travel agents who offer expertise in certain regions of the world, have experience planning tours or adventures, or who focus on group travel.