Attention is at the root of many common writing ailments.

Attention is at the root of many common writing ailments. Writer’s block, for example, might happen when you neglect open, mind-wandering attention and thus lose touch with the Muse. Procrastination and distraction are failures of the Scribe’s focus.

Alternate periods of focused writing with open attention. Accept that your mind will wander and make that part of your master plan. After working intently for a while, take a break away from the desk for a less mentally taxing activity.
(Pomodoro Technique)

Build open attention into the schedule.
Find the right environment for focus.
When you get stuck, take a break for the Muse. The answer to a problem often appears when you stop laboring to find it.
Invite the mind to wander.
Cultivate slices of solitude.

Janzer, Anne. The Writer’s Process: Getting Your Brain in Gear (p. 25-27). Cuesta Park Consulting. Kindle Edition.