How to overcome jet lag, which is a sleep disorder that occurs when a person rapidly travels through multiple time zones, as happens during international travel, air travel, and train travel. Learn all of my tips and tricks fro preventing and overcoming jet lag to ensure that you are able to hit the group running, without feeling exhausted, dizzy, unable to concentrate, or cranky, which are the most common symptoms of jet lag. I hope this guide helps make your travels more comfortable and energetic.