The very thing you do every day is the easiest way to reduce or eliminate stress: breath. Practicing breathing in a moment will help your brain train itself to concentrate on your present work. You will feel stressed out of the back of your head. Minutes to concentrate on breathing. Close the door, put aside the distractions aside and just sit on the chair and breathe. The goal is to spend the whole time concentrating on your breath, which will keep your mind from wandering. Focus on inhaling, exhaling, and sensation.