One of the most convenient ways to make a few extra bucks on the internet is by signing up for sites that reward you in turn for participating in surveys & studies. One of the sites I use is Project Report Card.
They have quick surveys which pay about $2 to $5 as well as studies that are over a longer period of time. I had a 5 day study once about credit cards that paid out $200. Though it takes a little time to reach the cash –out limit of $25, it is still pretty satisfying. You can only cash out using amazon gift cards, which might be an inconvenience for some but it is still pretty handy.Another advantage with signing up for PRC is that you may also get access to some exclusive communities through the site which do pay well.