One of my favorite exercises is using clues to reveal a hidden message, so I wrote a book of them. In What’s Left? – Holidays and Seasons, I have created more than two dozen related to the four seasons and holidays throughout the year. For each one, you are given a grid of 40 words or phrases and usually six clues (e.g., “Cross out all the words that are vegetables”). When you have crossed out all the words suggested by the clues, a funny or inspiring quote remains. Wonderfully satisfying.