well, one thing that's been missed...
make sure you have plenty of parents that are willing to bring in lots of food and drinks during the six weeks. it's something that you'll probably overlook, until you realize you're really hungry
also, make sure you just have an idea of how you're going to work everything. know who's job is what.
KISS, Keep It Simple, [Student|Stupid] (take your pick on the last word
). don't go overboard your first year.
lastly, make sure you can keep everyone more or less happy, and find out any problems between team members early on, because you don't want a huge brawl to break out with 2 days left till ship.
remember, this isn't just about building robots, you need to keep in mind that we're all still human, and we all have flaws that must be overcome.