First, the most obvious. A shower cap will protect your hair and forehead from paint and dust when you're working over your head.
Pull the elastic over the top edge of your safety glasses to keep the dust from getting in your eyes.
Speaking of sanding, if you're going to be kicking up a lot of dust, cover your smoke detector with a shower cap to prevent them from mistaking dust for smoke and going off in the middle of your project. Just don't forget to take it off once you're done working.
Keep a shower cap near the project so you have a spot to set your sander where you won't mar the surface and it won't leave a ring of dust behind.
If you need to walk from your project room into a clean room, pull a couple of those shower caps over your shoes - they'll protect the floors because you won't be tracking dust and dirt through the house.
See it's a good thing to keep shower caps in your toolbox! I'm Mrs. Fixit and it's just that simple.
