Best Habit: Observe Meatless Mondays. Eating less meat is good for our health and for the environment, and joining a large movement with a common goal is a motivating way to keep it up. MeatlessMonday.com has great recipes, tips, and community support.
Favorite Product: The SodaStream. The average American drinks nearly 500 cans' worth of soda annually, but with this home sodamaker, you get bubbly drinks without having to lug home (and toss) all that plastic and aluminum.