To get to sleep at night,
make yourself sleep at night.
Work at it. Earn it.

Tire yourself out.
Walk the extra megamile.
Exercise further/faster/more furiously.
Read yourself sick.
Excite yourself near exhaustion.
Stimulate yourself beyond belief.
Make it so your day cannot stand a second more
so that you could do nothing but snore for eight hours plus forty four.

This is the way to get yourself a comfy bed:
insist that you have nothing else instead.
Exhaust every other thing from your life.