There are many cost effective ways to help insulate your home in the winter.
You can insulate windows by using Window Insulation Film. The easiest way to do it is to just buy a window insulation kit which you can buy from a hardware store. The kits usually include plastic
shrink film that is applied to the indoor window frame with double-stick
tape, then heated with a hair dryer to shrink the film and remove any
wrinkles. You can also use heavy fabrics or layered curtains over the windows to keep out drafts, but that will also block out the sunlight.
Another good option is to utilize draft snakes. Draft snakes are fabric tubes placed on a window sill or under a door to
prevent cold air from creeping in. You can make one by sewing a tube of
fabric to fit the width of your window or door and filling it with dried rice. Or even easier you can also try placing dry, thick towels at the bottom of the window or door in place of a draft snake.
If you have a fireplace and chimney in your house, make sure that the damper is closed when not in use. This will keep
warm air from escaping as well as keep cold air drafts from coming in. If your damper is not
effective, use a draft-stopper specifically designed for chimneys, which
inflates to stop all the air leaks when your fireplace is not in use.