[Al Skierkiewicz]

There is one thing that I stress that has not been said yet. As a rookie, have a driving base by the end of week one or at the very least sometime in week two. Once you have a driving base, let your drivers practice with it regularly. Put out objects to practice maneuvering around. Push chairs in front of the base to act like other robots.
As Jeff hinted, make sure your bumpers are firmly attached, at the right height and made out of the materials listed. 3/4" plywood, pool noodles, covered with a heavy nylon fabric, covering the robot perimeter, with no hard parts in the corners. The bumper rules are not negotiable.
Then practice some more.
FIRST provides a lot of info for teams and adds to the list all the time. In addition, there will be weekly (or more often) team updates that change the game and the robot rules. We will inspect for the latest rules changes at each event, so you must keep up to date on those rules.
Ask questions, either on the FIRST Q&A or here. The Q&A is the only official answer but non-specific questions or questions about robot components will get you answers here. Just learn to believe certain posters know what they are talking about, while others might only be opinions.