One of my favorite sites to earn bitcoin is:
http://coinbycall.com/Basically you call a number and leave your phone off the hook.
It works best with a landline or a cell phone with unlimited minutes...
The pay out per minute is really small, but this takes almost no work whatsoever,
I just call after midnight and leave it going, it will hang up every couple hours or so, just call back.
Pay out is at 0.01 btc.... I've got payment proof, check out my signature.
If only there was a Canadian number...