I find that creating a regime and structure is the only way to be able to work remotely in a sustainable way.

I have work hours and none work hours. I have a work out routine that makes me wake up early in the morning, which in turn makes me sleep at a reasonable time

I give myself lunch breaks that I use to go to the grocery store buy ingredients and cook good food.

I make plans for my after work hours to see friends, attend meetups..etc.

Working in an office setting you are forced into a structure, with working remotely you have to create your own structure.