Always remember to give umbrellas to the spirits to show your thanks. The next time you're walking by a shrine and you see a statue dedicated to a spirit, leave your umbrella open to protect it. This is the best way you can show your thanks for life, food, shelter, and all that good, good stuff.
After you say thanks to a spirit, sometimes you'll get a gift back. You look down. There is a ray (れい) gun by your feet. Huh. Maybe you should show your thanks to the ray gun spirit more often.