Check the gutters – for proper flow and rain runoff. Also, check the hardware to ensure they are secured properly to the house.
Inspect the attic – for water seepage, condensation or even critters that found a warm spot for the winter and decided not to leave.
Examine foundation walls – to see if you have cracks from the winter that could let water in.
Check the roof – to ensure flashing, chimney and vents are in good condition.
Examine the condition of wooden decks, balconies, fences, gates, etc.
Fertilize the lawn
Inspect and repair roofing shingles (if needed).
Check the brick facing that may need mortar repair.
Examine the condition of doors and windows.
Paint those areas you have been putting off.
Have air conditioner serviced (hopefully before it gets too hot!).
Check the condition of the central heating system, fireplace (including chimney) and hot water tank.
Examine and reapply weather stripping around doors and windows.
Inspect the attic to see if vents are clear and that you are free of critters.
Clean the gutters.
Fertilize the lawn with Fall Fertilizer.
Reorganize shed/garage – put summer tools at the back and make your shovels, ice scrapers and snow blowers more accessible.
If everything mentioned above is taken care of throughout the year, you can reserve the winter months for small inside jobs and conserving your energy for shovelling the snow!