Hold 'Em Fix

I play a lot on FullTilt.  It doesn’t have as low stakes as PokerStars, which is a consideration if you are just starting out.  However, what I love is their Poker Academy.  The videos are great, and they’ve set up challenges that will help you implement what you learn.  You even can earn free stuff for participating (of course, you’ve got to do a gazillion challenges to get anything worthwhile… )  I think the caliber of player is higher in general that PokerStars at the micro/low level, although there are still many donkeys around.  They also have some really fun games like Matrix games where you play the same folks on four tables at once and Rush poker, which moves you immediately to a new hand whenever you fold (good for people who get antsy and start playing too many hands).