Maybe you have kids who got a little crazy with their markers while you slept through your alarm one morning, or possibly you picked up a thrift store find that's a bit marked up. No matter what your scribble-stress, if it's painted, it can be cleaned with toothpaste. True story! We stopped in over at This Old House where we learned about an easy remedy for removing marker from painted surfaces. Using a paste (not a gel) product, simply buff on with a rag and the stains will loosen. It might take a few applications for stubborn or older marker lines, but none the less, they should come clean.
Even if you don't have a child at home, adults can still have accidents with markers (or maybe that's just me) or pick up finds that have already seen some love and action in a past life and need to be made new before finding a home in your house. It's a great tip to keep in mind, after all a tube of toothpaste is only a few bucks and stripping a piece can cost much more, including time.