Couple charities like St. Jude and City of Hope.
Volunteer to help the Society for the Preservation of Big Horn Sheep. Caring for guzzlers out in the Mojave. Teach "Earthquake" preparation ( I get a lot of people wanting classes to prepare for Zombies.
.) Food, water, living, defense. etc.
Teach four wheel driving and take other disabled and cancer survivor folks camping. The last one is the most fun.