for small time changes, prepare your body before travelling
if you,re heading someplace that has only a few hours, time difference compared with where you live,Dr Czeisler suggested shifting your body clock closer to the new time zone a few days before your trip if you live in new York, for example, and are going to Los Angeles, which is three hours behind, go to bed an hour later and in an hour later than you usually do,if possible "even easing into your destination one third of the way beforehand will make it easier for you to adjust when you,re there,"he said