Wake up in time to eat breakfast and have it digested well. Nothing crazy, and dont start eating out of the norm because of the meet. Your stomach will not like it. Know that you will be fatigued during the day, and you will be wore down. Most of the time it does not effect me too adversely.
I would drop all my openers just a little. You know you are going to get the 2nd attempts, so the 1st should be like your last warm ups. I just like to have low ones for confidence. Judges like to see you have great control of weights, I feel it might give me the benefit of the doubt of a big 3rd attempt.
Do you have a goal total in mind? Make sure you have some alternatives for if you miss a weight somewhere along the way, that you can still get to your total. Remember that the total determines who wins the meet. I have a crappy spreadsheet that I use for this. I can send it to you if you like.
Remember this is just my advice, and everyone takes a meet differently. I am pulling for you.