If you’ve heard of crowdsourcing (and even if you haven’t), Amazon’s Mechanical Turk program is a great place to get involved. Much like at Elance, you input your info and skills. You then are able to search for different menial tasks ranging from identifying inappropriate web content to transcribing audio recordings to basic data entry work.
Just like at any other job, the more work you do, and the better your quality, the more opportunities you’ll have to make money. The payouts are often small, and your payment is received in Amazon credit, but Mturk is a great place to make mindless money while veg’ing on the couch watching TV.