Web Crawler there is a similar post that had some tips for you. Here are the two main things I do.
I exercise with a light jog or stationary bike to warm up.
I visiulaize my shots. I rehearse in my mind the shots I want to make and my opponents possible responses. In my mind, I say to myself HIT BOUNCE HIT, this really helps with my timing. I pretend the opponent hit a variety of balls and spins and say this HIT BOUNCE HIT as I mediate on this. In the match I use the same HIT BOUNCE HIT.
I clear my mind of distractions and at times I will turn on some Van Halen to get myself pumped up.
Those are my main match preparation staples. I am sure others can provide more.
Former USPTA Teaching Professional
Volkl Tour 10 V-Engine Mid/Luxilon Big Banger