Our team started this year with a meeting where they asked all the students what their goals were for this year. I don't remember all of them, but some of the goals we decided on were:
~More student leadership (being a senior, that got me my new title

)
~Closer relationships with other teams (that's when i started wasting my life on these boards)
~Better fundraisers...not sure quite how that worked
oh yes, and last but not least:
~cooler team uniforms (read this: "We have no team spirit and will never wear anything that might, heaven forbid, make us noticeable in a crowd"

)
still, having goals to work toward helped our mentors to understand what we reallly want. I especially liked having student leaders...we had four or five students that were given leadership of one particular area of the robot. It was the student leader's job to coordinate with the engineers in charge of that system, the other students working on that system, and the other student leaders. Personally, i think it worked very well.