Share Your Swim Space; Clean Air Filters

Share your swim space. Swim at your community pool or fitness center instead of installing a pool of your own. If you already own a pool, consider a solar heating system, which can heat your home water, too, a solar cover or install a timer and set your water circulation at intervals to cut down the energy consumption.

Clean air filters. Check air conditioning filters monthly to either clean or replace them. This will help the unit run more efficiently. Better yet: buy a permanent filter that can be washed and re-used. This will save you money over the long run and keep all those disposable filters out of landfills. If your unit is outdoors, check to make sure the coils are not obstructed by debris, plants or shrubs.

Take an Eco-Tour; Sleep Green

Take an eco-tour. For a conscientious vacation, try an eco-tour. These earth-friendly getaways seek to enhance awareness of our natural world, promote conservation, minimize impact and provide a positive experience for guests and hosts. Some even put you to work improving the local ecosystem. The International Ecotourism Society and Australia's Green Globe are good places to get started.

Seek "green" lodging. Business travelers and vacationers can decamp in "green" comfort, thanks to the growing number of urban hotels, luxury resorts and lodgings that are minding their carbon footprint. For an extensive list of hotels verified by readers, visit EnvironmentallyFriendlyHotels.com.

Carry Your Golf Clubs; Sail Away

Carry your golf clubs. Forget driving to the greens: These days, carts are definitely déclassé. It's hip to walk the course, carrying or pulling your own clubs.

Choose paddle or sail power. For guilt-free boating, consider a kayak, canoe or inflatable raft for a good cardio workout or a sailboat or sailboard for a little help from the wind. Added plus: With the exception of some sailboats, you'll save a bundle of green compared to buying a motorboat.