Jet lag is something that many people feel but not many understand Researchers are working to understand jet lag well enough to be able to prevent it. To avoid serious symptoms, it may help to drink plenty of liquids in flight, wear comfortable clothes, and move around every hour. Some doctors even recommend special diets to help cotrol jet lag. Books and anti-jet lag products are already available in stores. If you are planning to fly across time zones, don't jet lag ruin your trip.