Take a look at
this thread from last year, there is a lot of good information there.
As for things I would add this year, it really depends what type of bot you're going for. If it's a screaming speed machine, make sure you have a lot of practice to learn the minute adjustments required to keep it under control. If it's a hurdler, make sure you and your operator are in sync (just like last year, or every year before that) because if you're off center when they press the big red fire button, you could be sending the ball into the stands.
Ditto to what the 2 previous posters already said, regarding efficiency and visualization. You should be able to know
without thinking how to shift gears, arm up, launch, pivot 180 to the left, stop on a dime, etc. If you look down or have to think more than a split second for a control, that opportunity will be long gone before you ever get the chance to execute it (which goes along with one of my main points in that other thread, about just going for the chances and openings you get).
Good luck!