Never know where and how many batteries are in your house. Craft box as an easy storage container.
Never again forget your room's paint color choice! On the inside of your light switch or outlet cover, using a permanent marker, just write the date, paint brand, color name, swatch number on a piece of painter's tape for quick reference. Change the room color? Change the info tape! You can even add a touch of the actual paint in case you need to take it to the paint store to get a color match.
use candle wax before spray painting to give that worn look; brilliant!
Use a towel rod on the inside of the linen closet for holding blankets or tablecloths