When wiring or rewiring your workshop, consider installing extra outlets in the ceiling, positioned over groupings of power tools. Ceiling outlets can be more accessible and can help eliminate tripping over extension cords. If you are setting up or remodeling your workshop, also plan to install at least one outlet every 3 ft. around the perimeter.
If you have a room air conditioner, remove it for the winter or seal it up and insulate it. Water heater insulation jackets can work well for covering and insulating the air conditioner.