Respect your time. Respect other people’s time.
If you’re going to be late for a meeting or an appointment, make sure you let the person who you’re meeting know about your lateness. He can then rearrange his schedule and plan for something while waiting for you.
If you’re going to call somebody, …

Always remember to say “Please”, “Excuse me” and “Thank you”. You have no idea how happy the other person is when he/she hears that from you.
Do not go to a restaurant when you are starving. The bills won’t look good, I can promise you that. Eat something light before you …