One way to make sure you are saving energy is by not letting it go out the back door.  Here are some tips on where to find and stop leaks:

1) Seal the air leaks around utility cut-throughs for pipes (“plumbing penetrations”), gaps around chimneys and recessed lights in insulated ceilings, and unfinished spaces behind cupboards and closets.
2) Find out how to detect air leaks.
3) Learn more about air sealing new and existing homes.
4) Add caulk or weatherstripping to seal air leaks around leaky doors and windows.
5)  Find out how to select and apply the appropriate caulk.
6) Learn how to select and apply weatherstripping.