"people who were distracted did better on a complex problem-solving task than people who put in conscious effort. That’s because stepping away from a problem and then coming back to it gives you a fresh perspective. The surprising part is how fast this effect kicked in — the third group only had two minutes of distraction time for their non-conscious to kick in. This wasn’t the “sleep on it” effect, or about quieting the mind. It was something much more accessible to all of us every day, in many small ways."
tl;dr summary of David Rock
’s suggestions for changing your work process to tap into your unconscious mind:
Think about one question/idea that needs insight and keep this thought in your subconscious mind.Clear your conscious mind by using this two-step system: move your thought(s) from your mind to a list and then clear your list when you have a short break (if your meeting is canceled, for instance, or your flight is delayed).Plan your week and month by listing three priorities you would like to accomplish.Make certain you have at least four consecutive, uninterrupted hours a day dedicated to the three priorities you identified.
Three Ways to Think Deeply at Work - David Rock - Harvard Business Review