The leaves have started to turn and fall so now is a good time to start thinking about home maintenance before winter. We found a pretty thorough checklist on houzz.com: Your Fall Home Maintenance Checklist. Below are the highlights of the checklist:

Keep an eye on the overnight low temperatures and plan to shut off exterior faucets and drain and store hoses.
Check walkways, railings, stairs and the driveway for winter safety. Fix any problem areas now to make for easier shoveling once the snow is here.
Vacuum radiators, baseboard heaters and grates. Vacuum beneath the cover of your radiator if it's removable before replacing.
Test smoke detectors and carbon monoxide detectors; replace batteries as needed.
Remove window A/C units or cover with an insulating wrap.
Rake leaves in the yard and clean gutters and downspouts.
Mice and other small animals will soon be looking for a place to stay for winter. Make sure there are no holes or gaps in your home's exterior where they may enter.
If you notice any dead or sick trees, call and professional to inspect them and see if they need trimming or removal.
Replace or add weatherstripping to doors and windows.
Schedule furnace maintenance and chimney cleaning if applicable.