got one coming, what should i do
I haven't read any of the responses but the fact is, you are not going to teach yourself anything over night or become a better player then you are. Over practicing before a tournament can only cause you problems. One you may have a bad practice session and sink your confidence the night before the tournament. You have to have nothing but positive input. Practice the simple stuff, don't worry if you can't get out, in fact trying to mentally simulate tournament situations can only hurt you.
I remember practicing with Miz at a tournament and he would move the ball with his cue if he got in trouble and just forget about what happened. He set up easy stuff and pretty much just practices the physical fundamentals and paid little attention to the actual game we were playing. The game will take care of it's self. That is what you have been practicing all these years now you just let it happen.
Be rested, have your equipment ready. Also, take a reality check, it is supposed to be fun and it is not life and death. Play hard, what ever that means to you, don't quit till the last game is played, anything can happen and the rest will take care of it's self.
I used to run around with a guy who always told me the same thing when we were in a tough game. He would say, " You know how good he has to play to beat you". "If you bring your game even a world champion has to play like a world champion of he will lose."
Big Bob told me once to win a tournament match you usually only have to play your game. You can almost always depend on the other not playing his. This I don't think applies to world class play but it certainly applies to a majority of the tournaments most on this board play in. You can often win by just not giving it away.
I think I may have rambled a bit in this post but I hope there was something that you find useful.