-Practice all the time. When you mess up, keep going, and try to fix it on the fly. Record everything you do and listen to it later. Find out what worked and what didn't.
-Get some songs that aren't 128 BPM as well. Learn how to gradually bring the energy up. Unless you're the headliner and going on immediately after someone else, you won't be able to get away with playing only peak time cuts. Build up a nice collection of things from 110 to 120.
-*WARNING: Super cheesy spiritual life advice henceforth* Consume other media. Watch movies. Read books. Go to the art gallery. Find the emotions and feelings you want to convey. Get in touch with yourself.