I highly reccomend pokertracker. First chance I had, I plopped down the 55 bucks to get that program, great help to your game and has a good interface to go back and watch hands that you played to see what you might have done right or wrong, to improve your game, as well as showing FP$IP, PFR%, and how aggressive you are.

Worth every penny, IMO. They have a 1000 hand trial for you to try out at their website if you've never used it to try for yourself before you buy to see if you like it or not.