Well more info. is needed first. You need to find out what the gaps in your game is. If you just go on massive losing streaks here and there, you may have a propensity to go on tilt. If this is the case, you might want to look into reading a "Zen" like poker book that helps you deal with tilt, or just set a limit for yourself and quit a session if you lose a certain amount of Big Bets.

Is your problem in NL or limit? If NL, then you should be posting it there to improve, not in the SSHE section.

My best advice is to post your Poker Tracker stats up here and someone may be able to see any glaring holes (too loose preflop, not aggressive enough, etc.). But the main thing would be to constantly work on YOUR game. Read books that might be applicable to what you are playing. In this forum, the most applicable would be SSHE. Commit yourself to learn the CONCEPTS behind everything. You have to be able to understand WHY you are supposed to make a certain play before it is second nature. And start treating each session as a learning session. Take notes if you have to. If there are any hands that you have questions about, post them up here. You say you read 2+2 every day and you read books, but sometimes it is difficult to translate concepts from other hands to your own game. If you can see mistakes that you, personally, have made, it will be much easier for you to correct them in the future to improve your game. I hope this helps!