Here's a great way to keep track of your carpenter's pencil when you're working in the shop and your shirt doesn't have a pocket. Just stick the pencil to your safety glasses with hook-and-loop tape.
Miscellaneous Hardware Holder
To keep track of small parts, carry quart-size zippered plastic bags in your toolbox. They're a perfect place to store bits and pieces of things you're taking apart. Just write what's inside on the front of the bag, and you'll have everything in one spot when you get around to putting the item back together again.
Wet Paintbrush Storage
Here's another way to keep your paintbrush fresh while you take a break in the middle of painting. Snip the corner of a zippered plastic bag. Then slide your paintbrush inside the bag, handle first, and zip it closed. The paintbrush won't dry out, and the mess will stay inside the bag.