PBTC Sites:
https://coinad.com/?r=X4UAIJ4CN9F2ZOR - well paying site, 15-25 ads to click everyday
http://btcclicks.com/?r=1d000b5f - Not as good as CoinAd, but up to 40 ads to click everyday

FREE BTC sites:
http://freebitco.in/?r=58100 - Awesome faucet for free BTC every hour potential high reward every time.
http://www.bitvisitor.com/?ref=14khSESqBL2fz4KSKyEwLVA49iVYXvXkRM - though the rewards seem low, it's the highest paying site out there.
http://www.landofbitcoin.com/?r=3Wf82hS9ttQbYR9r - a faucet that generate bitcoin all the time (remember to enter captcha now and then)

I personally use these sites everyday, AND THEY ALL HAVE PAID ME several times!