An abbreviated (declassified) list of the CIA “Moscow Rules”

Assume nothing.
Murphy is right.
Never go against your gut; it is your operational antenna.
Don’t look back – you are never completely alone.
Any operation can be aborted. If it feels wrong, it is wrong.
Maintain a natural pace.
Lull them into a sense of complacency.
Build in opportunity, but use it sparingly.
Float like a butterfly, sting like a bee.
Don’t harass the opposition.
There is no limit to a human being’s ability to rationalize the truth.
Technology will always let you down.
Once is an accident. Twice is coincidence. Three times is an enemy action.