There are a lot of ways to earn money online now. I'm sure you've heard about paid blogging, pay per click and adsense. But recently I've heard about pay per install programs where you get paid for installing some apps, programs and etc.
It's really amazing how our time in the internet can also be used to earn extra cash. I remember telling a relative once that instead of spending so much time in Facebook, she can use it to make money through blogging. If only, we're paid just to be in Facebook, maybe a lot of us could be rich now, but instead it's only Mark Zuckerburg ( Top 32 in the world's richest people) who's getting richer and richer by the day. :)