As said earlier in a post. I think it's important to drill your skills vs your regular mates a week or two before and try to improve weaknesses but I don't play someone real tough in a match just shortly before a tournament. Get in the habit of wining and keep your spirits up.
I want to be going into the tournament ultra confident and playing at what I believe is a great level. So if I play a match, it's usually vs a weaker opponent to keep my spirits up. If you're not like me and you're not effected by wins & loses at all, well congrats for starters and knock yourself out. But if you're anything like me, mental is as big of the approach as anything.
A few weeks ago I won my class singles at a local tournament. While I'd guess that the way the seeding broke out, I was probably the #1 seed. However, I've never won a class singles event before. So I wanted to get that monkey off my back. Had finished 2nd a couple of times before. But never first in a singles event. In that tournament, I played well but I remember hearing the voice in my head "just keep fighting" over & over. Consequently, there were several times in certain games where I was down say 4-5 points in a game where a more rational thought might be, "well this game is most likely over" but I didn't think that. "Just keep fighting". And it worked. Shoot one game I was down 8-10 with match point being down 1 game to 2 in the semi-finals. But again I remember thinking "just keep fighting" and came back to win that match.
Hope it helps you. Good luck.