Check your attic for proper insulation and possible gaps around air vents, ducts, plumbing stacks and chimneys that penetrate the attic. Good weather sealing in the attic is especially important.
Check all storm/exterior windows. Make sure all window are in place and caulking around windows and doors is in good condition where frames meet brick or siding.
Look for drafts and gaps in your basement and crawl space.
Arrange for chimney inspections to be completed by the fall.
Purchase a programmable thermostat that allows adjustment of temperature settings according to a pre-set schedule. The savings can be substantial, up to 10 percent with a nightly setback of 4 degrees.
Never underestimate the power of a draft. A 1/4 inch gap at the bottom of an exterior door has the effective cooling power of a hole four inches square in the middle of a wall. A well-insulated, well-sealed home keeps cold air out, warm air in and controls moisture. Even a small investment in time and money can make your home more comfortable and make a significant difference in your heating bills.