I signed up to AirPair months ago and never really got in to it properly.
http://www.airpair.com
The website is terrible but the way it works is awesome! I've signed up as an iOS "expert". People can then log in and ask for help with a problem and they give details of that problem. I am then recommended by AirPair if the problem looks like it might be something I can help with (tags and stuff). Then I apply with a bit of text about how I can help and the user then chooses from the experts that applied. Sounds complex but it isn't.
Anyway, just done my second session taking my total earnings up to £100 (for 2 hours on Google HangOuts)
The guy I just spoke to said he'd be interested in booking me for future slots too. Up to 10 hours total! That's about £500
Woop woop!