Try to avoid using Styrofoam. Instead of eating out of the Styrofoam bowls at La Cantina or The Wok, take a soup bowl up to the counter or ask for it on a plate. Then just use the backs of these to take notes, doodle, or whatever. Pick up trash. Turn the water off when you brush your toofies.
Jars make great glasses, too.
Just because the label says it is made from recycled stuff doesn't mean exactly that. If it's post-consumer, it's the real thing. Your RA will be proud. Use your voice as well as your head. If your not helping, than as far as I can see you are just in the way.