#1 If you are flying during the holiday season in the Northeast, assume that your flight is going to be very delayed. In fact, assume that it will be so delayed that you will have to spend a night alone in an airport Comfort Inn in, say, Manchester, NH.
#2 If you do have to stay in a hotel, get directly into the king-sized bed, turn on the TV, and watch E!'s 100 Most Memorable SNL Moments. Remain there until the morning.
#3 Don't try to fly with an opthalmoscope in your carry-on luggage. The begloved TSA folks will think you are a terrorist and go through everything you own, right down to your pencil case.