Sometimes communication accidents causes angry, time wasting even de conflicts or breaking affairs up. 

After the many sad truth it’s time to break a little cheat sheet down:

-When you offer an appointment define strictly two holy things: when and where

-When you get an appointment offer don’t hesitate ask for two holy questions: when and where

-If meeting location is far; before exiting send an SMS or call for confirmation.

-In case of long waiting don’t go without book.

-In case of long waiting reveal your angry without hesitate and say your times value.

-Overlap timely or locationally near appointment. 

-Use Foursquare for tracking your buddies on it. When they are around you. you can meet with them.