Your experiance is going to derive what kind of practice you need. Over the years i have noticed that one of the biggest difficulties for newer drivers is being able to correct drive the robot as it is coming at you, because now turning, strafing, and drive directions are all reversed. Also, i agree with the other posts, what alot of people dont account for is the entire atmosphere that you have to work in during competitions. It is loud and you can't hear much, haha so either get used to it or wear some ear muffs (which i do not recomend) You can also try some other things to inprove hand eye coordination as well as memorizing controls, such as video games.
