“The reason people get good ideas in the shower is because it’s the only time during the day when most people are away from screens long enough to think clearly. The lesson is not to take more showers, but rather to make more time to think.”
Focusing on past accomplishments creates obstacles to success in the present. If you're still talking about something great you did 20 years ago like it was yesterday, your ego is getting in the way.
What you did in the past makes a good story. What you're doing now makes a difference.