I'm not trying to nail down what rules 1&2 are. They often read like this:

  1. Be attractive

  2. Don't be unattractive

This applies to all parts of life and relationships. These rules will get you far.

If the subject is, "doubt", then I see these as the analogous rules.

  1. Have confidence

  2. Stop emoting your doubt

If you start to feel nervous, stop yourself from reacting, including the dwelling on things. Catch yourself and say, "Hmm... I'm getting nervous. There are no negative consequences, and the discomfort will end soon, so get on with whatever you were doing and focus on the doing; not the reacting." Your energy is subconsciously readable and you shouldn't even focus on it in your mind. It makes you unattractive.