A way to practice keeping a clean slate is to avoid looking at the work too often. If you finish a section or come to a sticking point, consider putting the project away and not engaging with it for a period of time. Let it sit for a minute, a week, or longer, while you go get lost. Meditation is a valuable tool for hitting the reset button. You may also try vigorous exercise, a scenic adventure, or immersing yourself in an unrelated creative endeavor.
