1. Green up your appliances.
2. Watch the temp.
3. Save water.
4. Clean green.
5. Let there be energy-efficient light.
6. Save a tree, use less paper.
7. Want hardwood floors? Opt for bamboo.
8. Reduce plastics, reduce global warming.
9. Use healthier paint.
10. Garden green.
This list has tons of great information that can make a real impact. I highly recommend reading the complete article, as it details all of the above points in a way you can easily understand and implement.