Inspect air-conditioners: If you have central air you'll want to clean the exterior condenser unit and all of its components removing debris and trimming back any plants that are growing near it. You should also rinse down the interior of the unit straighten out bent fins and lubricate the motor. You'll also want to clean or change the air filters inspect the drain line for debris and make sure all hoses fit securely. You can do this all yourself with guidance from the unit's owners' manual or call in a professional. If you have window units the job is a little bit easier. You simply have to install the units and clean the filters. This is also a good time to deep clean all the fans and ceiling fans in your home.
Mulch: adding a layer of mulch to gardens and other non-grassy areas helps prevent weeds. It also helps the soil to hold moisture and nutrients during the warmer months giving your plants a better chance of growing.
Inspect for leaks: Checking exterior hoses and faucets for leaks can lead to big savings. Even a small leak can cost big bucks. Many small leaks can be fixed with a piece of electrical tape. You'll want to call in an expert for larger leaks.
Clean siding: Avoid streaks by applying the cleaner starting at the bottom and working your way up and rinsing from the top down. Cleaning your home's siding yearly can help prevent mold mildew and staining. It also keeps it looking brand new adding value to your home.
Inspect your crawlspace: check for signs of termites and moisture. Even floors that appear dry can be damp. Dampness can cause damage to the entire house. If you have a dirt floor installing a vapor barrier is recommended. If you have concrete sealing it is ideal. This annual check is also a great time to check sewer lines particularly beneath toilets and sinks for evidence of leaks.