Are you stuck with a half-finished puzzle and a spinning head? Don't let it stress you out -- crossword puzzles are meant to be challenging, but they're also supposed to be fun. It's perfectly fine to just walk away for a while. Unless you're competing at the American Crossword Puzzle Tournament, there's no time limit, so don't go nuts trying to finish the puzzle on your lunch hour. Sometimes the best thing you can do is to take a break and clear your mind. Come back to it later, and you might be surprised at what jumps out at you.