Travelling between time zones can leave your body’s internal clock a bit desynchronised. This Jet Lag effect can leave you affected both physically and mentally.
Sometimes it is better to think ahead and try to get you body clock set into the correct routine for your trip before you 
even depart for your trip. This can work by going to bed early for a few days if you are travelling east and later if you are travelling west.
Here are some more tips for avoiding Jet Lag.
- Avoid dehydration by drinking plenty of water before, during and after your flight.
- Steer clear of too much alcohol or medications when flying.
- Get enough sleep. This includes getting a good nights sleep before travelling.
- When travelling more than 4 time zones to the west it can help you to adapt to to the new time if you ensure that you get bright natural light in the early evening.
- When travelling similar distances to the east, if possible, try to arrive around midday so that the sunlight is at its brightest. Try to wear eye masks on the plane and sit in the dark and quiet.
- Exercising whilst on the plane can increase circulation and help to avoid excessive swelling in the legs and feet. This exercise includes walking aound the cabin and stretching in your seat.
- On arrival a moderately intense workout can help your body to configure itself for the new time zone.
- Get into the routine straight away. Start to eat and sleep when the locals do. Do not think “what time it is for you”. You are where you are and not where you were!