You can use several plastic 5-gal. buckets fitted with tough nylon tool holders to help organize your shop. When not being used they can be hung up neatly on screw hooks to the side of your workbench or inside a special cabinet. Using several buckets will allow you to organize in various ways, like inside work, outside work, plumbing work or electrical work.
Attic doors are a major source of heat loss in many homes. To stop airflow, weatherstrip the edges and insulate the back side of the attic door. Fold-down stairs can be covered with a lightweight box made of rigid insulation.