If you're selling a house, consider leaving behind relevant warranty information, operating instructions, and any maintenance tips that might be helpful to the new owners. If you're buying a home, request that information, along with a list of plumbers, electricians, pool companies, and so on that have provided reliable service in the past.
Clean obvious obstructions such as newspaper, leaves, etc. from around the exterior of the unit.
The use of ridge vent has increased greatly during the past ten years and when used with a soffit vent or vented drip edge, it is a very effective means of venting rafter bays, especially in cathedral ceiling areas. An air space in the rafter bay must be provided for full airflow. There are various styrofoam vent channels that, installed in the rafter bay, keep the insulation from fully filling the bay, to allow for air space. This can help keep condensation from forming on exposed roof nail ends and dripping onto the ceiling materials below during winter months.
Bent nails often result from poor hammering technique. However, they can also be caused by a dirty hammer face, especially when using cement-coated nails or working around adhesives. If you have problems, occasionally run a piece of fine sandpaper or emery cloth over the face. If you keep the face clean you will gain more solid contact with the nail and will avoid black marks on the wood caused by a dirty hammer.