Buy yourself your choice of reusable water bottle today

1. Get a handle on waste
If you've always wanted to start recycling, take a few minutes today to set it up.Try Flings bins for storage.

Similarly, look into starting that compost you've always wanted to try. If you're in an apartment, read up on vermiculture.

2. Choose alternate transportation
Take an hour or so to tune up your bike so it's ready for rides. If you don't know how to do it, check out this video.

Need a bike? Check out these great items on eBay.
2013 Ridley Fenix Di2 Carbon Road Bike
2012 Specialized Allez Sport Road Bike
2009 Specialized Dolce Elite Road Bike (for ladies)

If you're in a multi-car household, take a few minutes to think about whether you could get rid of a car. You could even sell it on eBay. You might be surprised — and remember, it might be cheaper to live with one less car!

3. Buy used items
Decide that this is the year you'll buy used where possible. When you need new housewares or shoes, pledge to visit eBay before you hit Target. Commitment lite: Pledge to try a local store before each inclination to visit a big box.
Other ideas...
Stock up on green cleaning supplies. Make it your Earth Day Resolution to only clean using baking soda, vinegar, and water for the next year — or to cut down on harsh cleaners.

Implement Meatless Mondays. Any way you measure it, we waste a lot of energy eating as much meat as we do. It's the 2nd Law of Thermodynamics.

Give up bottled water. Buy yourself your choice of reusable water bottle today, and get in the habit of remembering it.

This tip is the most fun: Pledge to eat mostly-local vegetables this summer. If you have a farmers market, make it a priority to visit it weekly and pick out your veggies. Do beware: at larger markets, people order in out-of-region vegetables, which kind of defeats the point.