Punctuality, makes your life simple and as well for others.
While I don’t mean that you follow a schedule ( make it mandatory for people – The Bandhua Majduur concept). But simply, if you have given time to somebody, be there on time. Let the other person be not waiting. In fact, reach a little prior to the meeting time. All of you agreed on the hours, then why don’t you keep it. Be it a business meet or a get together with friends.
Sometimes I feel, if I am the so “free” that I try and meet them soon. End up waiting on the streets, outside their door/apartment.
This is not something to be enforced, but should come from within. As well, you feel this when this happens at personal level.