ou finally made it to Paris, but instead of running up the Eiffel Tower, you’re passing out in your soufflé. Blame jet lag, when your body’s circadian rhythm — its expected sleep and wake times — is out of sync with your new location, leaving you with brain fog at midday or insomnia in the wee hours. Not everyone has the same body clock, of course, and no two trips are exactly the same, but there are some tricks that could help you get your zip back quicker.