Pursue your extracurriculars to another level.
If you play a musical instrument, teach younger students. If you run, do a lot of 5k events. If you play another sport, coach younger students and help run special olympics.
Combine two interests. If you are active in a special cause and another activty, join forces with friends and host a charity event- a concert, an art show, charity game. Get teachers and adults involved.
Anything and everything is possible.