Activism

PICK UP TRASH. Every time I go out hiking or climbing at the local crag I always see trash. Be mindful of where you are putting your trash, and maybe have a pocket in your bag you always put trash you find. If we all do a little bit to keep our wild places wild everyone will benefit.
PLANT TREES. Volunteering to plant trees is a great way to give back to the forest. There are plenty of local companies that organize days to go out and plant trees, they just need volunteers.
VOLUNTEER AT YOU LOCAL FOREST SERVICE. The forest service is always looking for help in the local areas. From helping build trails, to clearing trees etc. There's always something to do.
CHOOSE YOUR BANKING WISELY. A lot of people don't realize that one of the easiest ways to make a difference in this world is doing research on the bank you have your money in. All banks will use the money you deposit to invest in things and move it around. Your money isn't just sitting there. So make sure they are using your money for good and the things you care about. Go with local credit unions opposed to big nationwide banks.