I find the following works:
1.) High milage - this is different for each of us, but for me 15 miles is good and 20 miles is my max.
2.) Routine - I follow the same routine each night. I break for dinner on the trail around 4 to 5pm. Eat, clean up, pack up, and then hike until dusk. Make camp, set aside my evening snack of chocolate, hang my food, and tuck in by dark. I do my audio journal on my iPhone, then play Texas Hold'em or cribbage until I can't keep awake.
3.) Comfortable sleep gear - Exped UL 7 mat, Exped UL pillow, a nice Feathered Friends bag, merino sleeping cloths. I have a lot of weight tied up in my sleep system.
4.) Booze - I plan on about 2 oz per night carried in a recycled water bottle.
The last few years my sleeping has been great, averaging about 9 to 10 hours a night, even during storms. I got 11 hours in a couple of times last season.