More often than not things are delayed and it makes people angry. Think of the last transportation mean you took, the last person you waited for...
|Delays are a pain when they're discovered at the last minute... but not so much when anticipated|
Why can't people tell you in advance they're going to be late? Why is it always the same persons who keep you waiting?
When at work, always have an eye on potential delay. Like a plane that catches up its delay during the flight, knowing you're late will enable you to work faster when possible and meet your deadline on time.