Yep - you gotta do what you love to do or you'll get "found out" as just boosting your app.
Ask yourself....do you like kids? How about scouting or the YMCA?
Do you like feeling as though you are giving of yourself? How about serving Thanksgiving/Christmas dinner at a homeless shelter?
Do you like the holidays? How about a facility which gives & distributes packages to children in shelters or military overseas or battered women?
Do you like healthcare (ooops - obviously!) - how about volunteering in a hospital, Planned Parenthood, Red Cross?
Do you like environmental issues? How about joining "clean up" crews around highways, beaches, parks, etc..
Try to google volunteer opportunities & put in your zip code or city/state.
But...do what you like!!! This is part of developing who you are.
Good luck!