To be more productive, stop

Always stop in the middle of a project and go for a walk, don’t power through and reward yourself when you are done.

This does 2 things:
1. it allows your subconscious to work on the problem.
2. you get some perspective.

Never fear: You will wish to continue the project when you get back. This is known as the Ovsiankina Effect.

attention awareness behavior belief change choice contradiction creativity death desire ego empathy fear forgiveness freedom goals growth happiness identity individuality insight knowledge language life love nature pain perspective politics power present productivity psychology purpose rationality reality reason responsibility self society stress time truth value work