If you plan on taking your holidays in a country that has a big time difference from where you are coming from it is inevitable that you will more than likely run into jet lag. But if you prepare yourself well and do a few things listed here you might be able to overcome some of the effects of jet lag.
One of the most important things to do is to find out what the time difference is between your home and your destination. After you have found out what that difference is it is always a good idea to start assimilating yourself to that time difference. You can do this about four days before you are planning on leaving for your trip. For example if you happen to be going somewhere that has twelve hour difference you might want to make your bed time about 30 minutes earlier each night. You should also start getting up 30 minutes earlier each day. You are not going to lose any sleep by doing this, you are simply forcing your body to adjust it's days and nights gradually.
As soon as the day of travel arrives make sure to exercise. Make sure to try and do some sort of exercise for about 30 minutes of the morning you are planning to board your plane. This is because you are going to be sitting a lot while on the plane.
Make sure that the foods you eat are light and make sure you have snacks as well. Don't eat anything that is greasy or sits heavy on your stomach. Make sure to avoid the food at the airport and definitely don't eat Chinese food or even hamburgers. While you are at the airport make sure you walk around as much as you can.
It is important to drink a lot of water before you board your plane, while you are on the plane and plenty right after you arrive and get off the plane. The reason for this is that when you fly you get dehydrated. Understand that drinking things like coffee and soda will only make things worse. Also make sure you bring several bottles of water on the plane with you so you don't always have to rely upon the attendants to bring it to you when you feel like you need it.
You need to take into consideration what time your plane is going to arrive at your destination and make sure that you have a plan for your sleeping time while on the plane. If you know that your plane is going to arrive at night, do your best not to sleep on the plane at all. You will be very tired upon arrival and will be able to sleep quite well. If on the other hand your plane is going to be a morning arrival or sometime during the day it is a good idea to try and sleep on the plane so you can be awake during the day so that you can immediately get your body on a proper sleeping schedule for your vacation. Remember do not take any kind of nap if your arrival time is during the day because you will definitely have problems with your sleep cycle from day one.