I joined a verteran team as a mentor in 2003 and the thing that surprised me most was how the games were played vs. how I thought they would be from the way they were described in the FIRST literature and animations. Based on this experience I recommend looking at the game rules from the last two or three years with students and trying to figure out how to play the game. Then look at video, posted here on CD or other online resources, to see how close your version of the game is to what actually happened. You may be suprised how right or wrong you are.
Also this is a good time to make certain projects that will be useful during the competition season such as; a robot cart that can take a robot through any standard door way and roll over objects like wire trays, a travel tool box, a reusable shipping crate (dimensions available from first). I also suggest organizing and inventorying your shop. If the tech ed teacher who runs your shop is as much of a pack rat as MO this alone could take the next month
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Have fun and welcome to the FIRST community.
Pete