It will turn into an avalanche

When you get stuck waiting use your time to explore ideas you never have time to think through. It's a good time to plan the details for the weekend or the vacation that you dream of taking one day. Whatever you do keep your mind occupied with thoughts you choose to explore. Even watching a fly as he explores the room will keep you from letting the thought of how long you are waiting turn into an avalanche of all the negative thoughts of what you could be using the time to do instead of waiting because once the avalanche starts you will bury any chance you have of having a good day.