… repeated tends to perpetuate itself,” William James wrote in his influential meditation on habit, ”so that we find ourselves automatically prompted to think, feel, or do what we have been before accustomed to think, feel, or do, under like circumstances.”
Before you go scrolling through your email, probably stumbling across a to-do that immediately puts you into a bad mood, go do something for yourself. Make a cup of coffee and pick up a book. Read the newspaper. Go for a run. Write. Paint. Play the piano. Anything that is just for you and only you.