When you're finishing a painting project, write on a piece of masking tape the date and how many gallons of paint were needed for the job. Stick the tape to the back of the light switch plate. To get the exact shade next time, also include the color formula sticker peeled off the paint can. When the room's due for a fresh coat, you'll be ready to go.
Clever!! What a great idea to hang a picture!! Put the toothpaste where you will want the nail to go. Then, press the picture to the wall where you want to hang it so that the toothpaste from the back of your frame sticks to the wall.