Get rewarded for buying and doing things you are probably already doing through reward programs. I've listed the programs below that I take advantage of. 

Thanks to these programs, I have received many free product coupons. This is great for keeping your budget in check each month. 

EcoBonus: Collect & Earn Rewards Program. Earn EcoBonus points by redeeming codes on products from brands like Annie's, Organic Valley, Sambazon and more. This is a new program that started November 1st, 2011. 

Earth's Best Loyalty Program: Earn points from your Earth’s Best purchases and redeem them for discounts and prizes from Earth's Best and their partners. Head over to Earth's Best Rewards to check it out. 

Stonyfield Rewards: Collect & Earn Rewards Program. Collect lids from Stonyfield yogurt products and redeem them for coupons for free products, magazines and more. Look for specially marked products in stores now. 

This program is slated to end April 12th, 2013. 

Seventh Generation Rewards: Earn points from Seventh Generation by taking actions like watching videos, taking quizzes, and more. Turn these points into coupons for products fro Annie's Earthbound Farm and Stonyfield to name a few. 

Recyclebank: Take green actions for points that you can use for rewards on Recyclebank. These actions can be recycling through their program, committing to use less water during your shower etc. 

They have a great referral program, get 10 points for every friend that joins through your unique link. They frequently have contests where you can win amazing prizes like eco-friendly vacations, and new kitchen appliances.