- turn off the lights when you're not in the room, or use them less
- shower instead of taking a bath, shower for less time, and shower together!
- unplug appliances when you're not using them
- ride a bike!
- use public transportation
- walk somewhere!
- change your lightbulbs for fluorescent ones
- if you want to keep your car, use it less or use it responsibly
- trade in your car for a smart car, or an electric
- eat less meat (this seems pretty drastic to me, but some people swear it'll work)
- recycle things! be it plastic, glass, cardboard or paper
- plant a tree; you can plant one yourself, with your friends or donate money for someone to plant it for you
- buy organic products, or ones from a farmer's market
- stop using (or use less) aerosols and sprays
- try to throw away less things, reuse them or set up a garage sale!
- go camping instead of staying in a hotel
- go do something outside!
- start your own garden
