What is the time control?
Tournament

depends how much time you have
If it is weeks to months away; I would (and I do) immediately stop playing blitz to try to get use to the slower pace. if you have days until it begins, your best bet is to simply get enough rest and try to be relaxed and calm. Hoping for victory but not worried, anxious, or expecting a lot of (initial) success.
like everything; you 5-6 time is likely to be tons better than your 1st.
So...I am going to a tournament. What should I do to prepare? Any tips?