~Go build with Habitat for Humanity for a day.
~Pick a work and learn it in as many languages as you can.
~Take a first aid/cpr class and get certified.
~Get a box and see if you can fill it with things for charity.
~Mow a lawn or trim some bushes for an elderly neighbor, or one with many kids.
~Pick a country you'd like to go to, study up, plan the trip and find out how much it would be. Start a bank!
~Enter a contest. Anything! Photography, drawing, poetry, whatever!