In spring and summer, keep insects at bay with a pesticide that relies on natural ingredients (Bugzilla,
about $20 for 32 ounces; bugzillapesticide.com
Keep a bag of kitty litter handy for absorbing oil and grease spills. Place a broom and dustpan or a handheld vacuum near your workbench to tidy up after working on projects.
Hose down the floor regularly.
At least once a year, weed through your belongings and sell, donate, or toss what you don't need.