Keep score in your head. What you score matters even less than whether your accounting is accurate, which matters not at all. If you’re living with others, keep score of who uses the bathroom first in the morning, who takes the most or the lengthiest showers, who opens the fridge the most in a given day. If you’re running, keep score of how many runners you pass along the way, as opposed to those who pass you. If you’re driving, keep score of how many vehicles pass you on your left, as opposed to those you pass on your right. Keep score when others don’t realize that you’re keeping score. Announce scores from time to time, especially when feeling aggrieved.