Almost anything that's environmentally and/or socially responsible--such as wind turbines, solar cookers, and fair trade organic dark chocolate!
Healthy and delicious food--such as homemade oatmeal raisin cookies...mmm...
Books:
One of the last books I read was Kira-Kira, by Cynthia Kadohata--I highly recommend it!
Heroes/Idols:
My eco-heroes are Severn Suzuki and her father, David Suzuki