Keeping your home in tip top shape leading up to a sale of your property.
Clean your gutters. If we could repeat this ten more times, we would—clogged gutters are the source of massive amounts of water damage.
Prepare your air conditioner. Trim plants and shrubs away from your central air conditioning unit. Contact a professional to change the filter, clean the coils, and unclog blocked lines if necessary. (Depending on experience, you may be able to do this yourself.) Remember that window unit filters should be changed every 60-90 days.
Change your furnace filter. Why wait to get ready for Spring?
Check smoke & carbon monoxide detectors. There should be at least one (preferably more...