If I was tasked to write an Operator's Manual for being a human being, I think my first instruction would be to follow Quentin Crisp's pithy admonition:
"To know who you are - and be it like mad."
I'd also recommend that you should never run to catch a train. Don't worry there will be another.
And if you are looking for the calm center in the storm, you don't really need to venture very far - it is between your ears.