Having your spouse or traveling companion take the wheel during a long drive seems like simple good sense, and it's often a virtual necessity. As long as all drivers are qualified, swapping the driving duties doesn't add even a fraction of a penny to the rental company's cost or risk. But that doesn't stop those companies from hitting you with an extra-driver charge of up to $13 per day, per driver, sometimes with a minimum charge of more than $90 per driver.
It’s a far cry from doctors’ typical jet lag tips ― like avoiding caffeine and alcohol before you try to sleep, slowly adjusting your sleep schedule to a new time zone or even using small doses of melatonin to help fall asleep when your body typically wouldn’t want to, the study’s author Cristina Ruscitto, a researcher in the Department of Psychology at the University of Surrey (and former long-haul air crew member), told The Huffington Post. The idea is, she said, “that you readjust by eating in line with local time ― not just sleeping on local time.” This revelation could be an easy fix for jet lagged travelers everywhere. 
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