Some thoughts for you to consider:
[*] You said you play only NL Hold'em. That's mistake #1. Good players learn to play several games. You will learn about your NL game by playing other games. [*] Be careful what tourneys you play. Some of the big ones with lots of participation require a lot of skill and luck just to cash. [*] Take a page out of Daniel's play book and only play when you are genuinely interested in playing. Be sure you have the time, seriousness, and mental/physical energy whenever you sit down at that table with your money.[*] If you're overdrawing your credit card then it'