Hi,
I undestand how difficult is to start in this business right now but my advice is for you try out the affiliates programs who will convert despite their competition among webmasters.
I have tryed GF and Windows but they never converted for me.
Since my main traffic is poker, i put some links to casinos around and from my point of view you should try them first and after you can expand your list.
Casinos: Casino Blasters, Wager Share, Fortune Affiliates
Poker: Partypoker, Ultimate Bet/Absolute Poker,
Bingo: Bingo Reward
See also this full list here at CAP : Certified Programs List
Good Luck