Odds are that you don't recall the colour of your fridge because it's covered with magnetic calendars handed out by your dentist, estate agent and local council. DIY craft weblog Craft Chi demonstrates how to turn this "insane magnet situation" into a pile of whimsical, useful magnetic bookmarks.
Unlike ordinary strips of ribbon, old receipts, or business cards, a magnetic bookmark wraps around the page you're marking and keeps your spot without slipping out using the magical powers of magnetism. It leaves those prone to dog-earing pages unable to whine that they keep losing their bookmarks and spares them from the wrath of aggravated bookworms.
A single magnetic calendar can be made into several bookmarks, and they're easy to make, so why not give someone a pleasant surprise by leaving one in a book? Check the link for detailed instructions.