Like I said in the article, it's always important to show up to work early. However, you cannot control everything, like traffic. If you're running late, making sure you reach out to not only your boss but your coworker as well. Apologize and explain shortly why you're running late. Don't over-explain or make up more excuses, keep it simple or else it'll sound too anxious. However, try to always leave your house early and always count on traffic time. This way, you'll hardly ever be late.