1) Wear a hoodie. Preferably a cashmere hoodie, but any old hoodie will do. The deeper the hood the better. Pull it up whenever you want to sleep or dissuade others from taking the free seat next to you. For best results, accessorize with a scowl.

2) Eschew all silly travel accessories and accoutrements. Beanbag neck pillows, travel blankets and book lights are all more trouble than they’re worth. Comfort is about avoiding hassle, not creating more of it, and that’s exactly what you’re doing while fiddling with your portable Obus Forme 10,000 metres above sea level. Leave such stuff at home, or, better yet, don’t buy it in the first place. The one exception to this is a sleep mask, but most decent airlines provide them anyway.

7) Do carry-on only wherever possible. Pack lightly and stuff everything into the smallest possible container. Hide overflow in a giant handbag and hold it over your shoulder and behind your back to avoid having your hand luggage go over the weight limit. Ignore people who give you dirty looks for filling up the overhead locker.