How To Save Your Planet

1. A Mug of Your Own

Every year Americans throw away 25 billion polystyrene cups and 25 billion individual water bottles, most of which end up in landfills. Instead buy a reusable to-go mug and a bottle that you can refill with filtered tap water. Bring your own (to a coffee shop, a meeting), and you cut down on Styrofoam.

2. Eat Ice Cream from a Cone

A cone beats a cup. Why? "You're eating your silverware instead of using plastic," says Matthew Modine, a passionate promoter of earth-friendly policies. "It's all about consuming less, using fewer of the resources needed to make products and packaging."

3. Clean Without Chemicals

Natural cleansers like vinegar and baking soda do a great job without harming the planet. "And," Matthew says, "a little vegetable oil and lemon juice makes a great wood polish."

4. Bag It

Get reusable cloth bags for the grocery store and the dry cleaner. More than 100 billion plastic bags are thrown away every year.

5. Stop Junk Mail

Every year 100 million trees are chopped down for junk mail sent to American homes. Contact the direct marketing association at dmachoice.org/mps to remove your name from mailing lists of their members.

6. A Better TP

Recycled toilet paper is scratchier that three-ply, but it's much softer on the environment. "It's like switching from whole milk to skim," says O writer Aimee Lee Ball. "After a while the beloved original seems over-the-top."

7. Compact Fluorescent Bulbs

Compact fluorescent bulbs (CFLs) use four times less energy than incandescent ones. If every American family substituted five CFL bulbs for incandescent, it would be equivalent to taking eight million cars off the road for a year. Ball says "They cost a little more up front, but they last up to 15 times longer."

8. De-Lint the Dryer

Lint builds up after every dryer cycle, reducing the machine's efficiency. Removing it does a lot to decrease its usually massive energy use.

9. Pick Safe Paints

According to the Environmental Protection Agency, architectural coatings such as paints and varnishes are the second-largest source of fumes from volatile organic compounds, substances that evaporate at room temperature and react in sunlight to form photochemical smog. Look for cans with "No VOC." We'll all breathe easier.

10. Shorten Your Shower

Low-flow showerheads would be a big improvement. "If they're well designed, the pressure should still feel good," says Laurie David, another prominent activist in Hollywood. "For every two minutes you shave off your shower, you save 10 gallons of water."

11. Shut Down Your Computer

The average computer left on all day uses nearly 1,000 kilowatt hours of electricity a year, producing more than a ton of carbon emissions. So turn off your computer anytime you're not on it, and eliminate the screen saver function, which uses more energy than the sleep mode.