Preventing light from reaching your eyes in the morning either via sleeping mask or good blinds + making sure there are no electric lights visible. In other words: sleeping in total darkness until you want to wake up.
Fast.
If anything, increase the number of hours without eating before bed.
For me, I'd have to get rid of my dog.
Which, at least for me would be a massive decline in quality of life.
Going to bed a lot earlier. Some people just can’t sleep past a certain time no matter what.
Edibles can sometimes be effective
Collagen hydrolysate (12 g) helps me sleep longer.