In Ian Fleming’s 1959 novel Goldfinger, it mentions a rule to James Bond in Goldfinger’s warehouse in Geneva. In the International Spy Museum in Washington, D.C., the Moscow Rules are listed:

1. Assume nothing.
2. Never go against your gut.
3. Everyone is potentially under opposition control.
4. Don’t look back; you are never completely alone.
5. Go with the flow, blend in.
6. Vary your pattern and stay within your cover.
7. Lull them into a sense of complacency.
8. Don’t harass the opposition.
9. Pick the time and place for action.
10. Keep your options open.

I know these are fictitious rules for the spy, however, a few of them are definitely rules to live by or at least use in business deals.