Prepare Before You Leave
It may sound almost too practical, but the quality of a short night's sleep is determined in part before you even walk out the door. Make sure your bed is ready to welcome you, not another task waiting to be dealt with.
Fresh bed linen, a bedroom that hasn't turned into a sauna during the day, no clothes scattered around, and nothing left on the bed that you'll have to clear away first. These may seem like small details, but when you come home already exhausted, your body has little patience for unnecessary obstacles.
Stay well hydrated throughout the day, especially if you'll be standing for hours at a festival or concert. Dehydration increases fatigue and can make the sleep you do get less restorative. It's also a good idea to eat a substantial meal before you leave, so you're less tempted by a late-night snack that sits heavily on your stomach just before bedtime.