Firstly, avoid alcohol in flight. With the pressurized air in the cabin your body dehydrates substantially, and alcohol affects the body clock by not giving you a full and refreshing sleep. Try to drink as much water as possible. Just ask the steward(ess) for a large bottle and keep it by your seat so you can take sips whenever you want. Drinking a lot of water will also help in other ways. It is highly recommended to move around when in-flight, walk up and down the plane, do dome stretching exercises, to keep the blood circulating, and stop the joints from stiffening.
While seated, swirl your ankles around from time to time. Depending on which direction you are traveling whether east or west, and how much sleep you require, you should set your watch to the local time of your destination as you board, and sleep according to that. This helps your body to start the change in its body clock, which is so important when combating jet lag. Let's say for example that you are flying from
When you do arrive at your destination, and it is day time, try not to go to sleep, no matter how tired you are. Instead try to go outdoors and into the sunshine if possible, this helps to alter your body clock, and will mean you will be back to normal a lot quicker. One of the first hotels to offer a jet lag service was the Okura Hotel in
*) Taken from: http://www.alltraveltips.com/beatjetlag.shtml