Yep, I memorize it just enough to were I know the basic pattern. Then I look at if the transitions are at, before or after the letters. Once I go down centerline and make my turn, I pretty much go on auto-pilot ;) Don't really have to think about the letters... just ride the pattern.
I second tracing them on paper, "riding" them on foot and talking through it to someone else right before your ride.
Xhaltsalute, do you know that you can print those diagrams out instead of making them? I have them all printed out and they go to the warmup ring with me at shows. They're so much easier to look at if you want to check a movement right before you go into the ring :)