BASEMENT/LAUNDRY

19. Reach behind your clothes washer.
Turn down the hot water tap for the washing machine so less goes into the warm-water cycle. Perspiration and most other dirt dislodge best at body temperature, so you don't need water that's warmer than 100 degrees. Since most washers simply open both the hot and cold taps to make "warm" water, it may take longer to fill the machine. But you'll save about $40 annually on your water-heating bill.

20. Spend more time in the basement
Make sure furnace filters in forced-air systems are clean. Dirty furnace filters restrict airflow and increase energy use. Cleaning them, or swapping them out each month during the winter, can save you up to 5 percent on your heating costs. Also schedule an annual checkup before the heat comes on to see that the furnace is properly calibrated.

LIVING AREAS

21. Listen to your mother
And put on a sweater. That way you can turn down your thermostat this winter. Adjust it by just one degree for eight hours a day, and you could save 1 percent on your monthly heating bills. Do it for 24 hours and save 3 percent. Try setting the temp at 70 degrees during the day and 62 at night during winter (and 78 or higher come summer). Heating and air-conditioning account for nearly half the energy used in our homes, so every little bit less you use makes a dent.

22. Worship the sun
Or at least use it to your advantage. Open blinds or drapes to let in natural solar heat on cold days, then close them once the sun sets, and you can reduce your heating bills by 10 percent. You can also cut your cooling costs by up to 33 percent in the summer by blocking out sunlight with exterior blinds, shutters, or awnings. To keep rooms bright, paint or paper with light or reflective colors.

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