Here is a counterintuitive one: Don't forget to reward yourself, especially when you are proud of the work you've achieved for the day or week. Taking care of yourself outside work hours helps you get re-energized and prepared for the next day.
It can be small: meditating, leisurely downtime, entertainment, time out on the town, etc. Whatever it may be, your remote work process should account for de-stressing and re-charging.
In design, the term "white space" or "negative space" helps emphasize the elements around it, such as a logo. The same concept applies to remote work. The best remote process factors in the negative space and this directly translates to productive working hours.