Leave your "skyscraper" heels at home, as they will only interfere with your mobility, not to mention the damage it will do to your spine.The 4th Commandment is to make sure that you nurture yourself on long flights. Drink plenty of water, even if it means more frequent trips to the lavatory, and limit your alcohol intake. The pressurized environment of an aircraft is extremely dehydrating. Keep your skin clean and well moisturized on the flight, and for ladies, if you can manage it, leave your face make-up free. Any foundations or powders will merely clog up your pores. If you have an ipod, I cannot recommend listening to guided meditations on the ipod highly enough.
From personal experience, it helps reduce jetlag. Wear clothing that has a stretch in it and does not cut into your arms, chest, waist, crotch etc. get up frequently for a stretch and a walk up and down the aisles whenever possible. The more that you can nurture yourself on a long flight, the more energy you will have and the less jetlag you will experience when you reach your destination.The 5th Commandment is to keep a travel diary or journal in order to record all your experiences for posterity, and to share with friends on your return. Take note of all the interesting sites visited and the names and addresses of any fabulous eateries and restaurants.