Word wall. As soon as I find the right quote, I am definitely jumping on this project. You can get a set of letter stencils at the hardware store for a few dollars, although you may want a couple of packs to make things easier. Draw straight lines and then make the words on the lines. You may have to play with spacing a bit in order to get it right. Lightly blot on the paint with a fairly dry brush to keep the color from seeping under the stencils.
Tip: If you don't have any leftover paint, you can purchase a sample jar while you are at the hardware store getting your stencils. The jars are small and will provide enough paint to get you through the project. Practice your blotting technique on a piece of paper first.