'ACE' is one of the acronyms I've used over the years. It stands for 'Acting cures everything.' You weren't promised to come to the ballpark and feel great on your start day. Basically, how can you put something on display to the opponent that gives the appearance of 'OK, this guy is locked in today,' whether you are or not?
I like to get the body temperature up, the heart rate up. I'll do anywhere from 10 to 25 minutes either on a bike, a rower, a StairMaster, or a combination of the three of those. And then I'll normally run through a 20- to 30-minute session either on the Pilates reformer, the Cadillac, or the Pilates chair.