Always be on time or better yet, be early.
Never, ever arrive late to anything. Professional, academic,business, family, friends, etc. it’s just rude and disrespectful and frankly no one cares about the traffic or construction or road closures or GPS malfunction. All they care about is that you’re late. You didn’t care enough to get organized and be on time. That’s what people remember, not the excuses.
Respect people’s time, don’t waste it. Plan for your meeting to run a bit late, plan to not have enough gas in the car, or needing to stop for coffee……build these things into your schedule.
Being late is a character flaw, and people won’t want to work with you if you’re not reliable and dependable.