making a profit

[gjpure]

My main goal in playing poker it to turn a profit. It is not fun otherwise. I know some people like the throw their money away and gamble, but I want to consistently make a profit. I have noticed, however, that this seems much easier to do at the casino than online. The caliber of play seems better online, and you see the same guys over an over, and many of them are obviously profitable as well. So the first question is..how can I adjust my play and be sucessfull online? IT is much tougher to read players since I cant see them, and players are always coming and going and it is tough to pay attention. I dont like this and I get imaptient and then I start making a few bad decisions and get frusterated.
The other problem I am facing is in tournaments. Clearly the odds of making money in a tournament are lessened, but I play totally differently as well. I play more agressively, which is probably correct, but my hand selection is poor at times and I am being impatient from the get go. I know I am a better player than that, so why do I play so differently in these different situations? What is the best advice to playing profitably from a variety of situations? Do some pro's avoid online games for this reason?

Thanks.