My Ranking:
#1)
coinad.com 0.001BTC / day
#2)
bitvisitor.com 0.0001 BTC for the first 5 minutes and around 0.00008BTC every 5 minutes after (maybe if you used multiple receiving addresses you could always get 0.0001)
#3)
dailybitcoins.org 0.0001BTC / day
#4)
coinurl.com Approximately 0.00007976 BTC every time someone clicks your link.
#5)
mycryptcoin.com (1/1000) chance of winning ???BTC. Can be tried every hour.
#6)
freedigitalmoney.com Kind of like coinworker in the sense that the requirements and payouts vary. Tends to be a lot of people demanding you download things. I tried one of the surveys and it was just some asshole collecting information (I lied on it all), and then forcing you to wait 10 minutes while it "processes" your results. It just collects info and then doesn't pay you. So be careful which tasks you choose.
#7)
fiveminutecoin.com <down>
As dpalme said, you aren't going to make much money doing these.
