If you wait it will go away. If it was bad, it'll come back. Nothing is always. Everything is something. No matter what goes wrong, there is always someone who knew it would.
Complex problems have simple, easy to understand wrong answers.
To err is human, but to really foul things up, requires a computer. A computer program does what you tell it to do, not what you want it to do. When putting it into memory, remember where you put it. Never test an error condition you don't know how to handle. Opportunity always knocks at the least opportune times.