Adult version:

pretty, orderly and clean bedroom
inviting and comfortable bed.
bedtime stories and/or music to wind down (book at side of bed, music that turns off after 15 minutes)
glass of water by bed
something nice to look at on the wall facing the bed

Be as kind and loving to yourself at bedtime as you would be to a child you love.

This is often a terrific challenge to a person with an eating disorder.  The benefits in meeting this challenge are vast.