The time leading up to your vacation may be extra stressful, as planning and budgeting for the trip can take a lot of time and patience. While it is almost always worth it to enjoy your trip, this stress can often lead to sleepless nights for days or even weeks before the vacation starts. Starting your vacation with a lack of sleep can actually make it harder for you to get restful sleep, not easier. It can also be difficult for bodies to adjust to different elevations, time zones, and forms of travel.