Yes, the easiest and most effective thing you can do TODAY for the planet is sign up for 100% wind power through your electric company. When you do this, they have to buy wind power, which means that they don't have as much money to buy coal plants. It's really easy. For those in DC, MD, and VA:
1) Go to this form.
2) Fill out the form (with your electric account number on hand).
Totally easy! More info can be found at Clean Currents. Also wind energy rates are LOWER than Pepco and BGE Maryland Residential Rates. I looked at the actual Pepco rate schedules, which are rather confusing, but wind is 10.8 cents/kwh, while the standard rate is definitely above 10 cents/kwh (unclear by how much). In any case, the environmental benefits are huge, so switch now.