Homework
(but seriously, I used snow days in HS to get ahead on homework, chores, and prep-work for robotics so my time in the shop was more productive and less intrusive on my other obligations)
There is tons of robotics work that doesn't need to be done in meetings and you can use this time to make meetings more productive: CAD, award submissions, reading the rules, getting your code structure set up, planning upcoming meetings, writing rules tests, researching parts and subsystems, ordering parts, finding hotels/transportation, reading the rules, designing shirts, setting up your scouting system, coming up with an itemized list of tasks that need to be done so no one can say "I have nothing to do" at your next meeting...