You get what you concentrate upon. There is no other main rule.

Expectations are the engines of our perceptions.

What could you measure? What would that cost? How fast could you get the results? If you can afford it, try it. If you measure it, it will improve.

It’s better to make a decision, even the wrong one, than to be in limbo.

It is not virtuous in any way to put yourself down, or to punish yourself, because you do not feel you have lived up to your best behavior at any given time.

If you're considering word of mouth, stability and lifetime value, it's almost always true that the easier it is to get someone's attention, the less it's worth.

Do not personally give any more conscious consideration, either of you, to events that you do not want to happen. Any such concentration, to whatever degree, ties you in with those probabilities, so concentrate upon what you want, and as far as public events are concerned, take it for granted that sometimes even men are wiser than they know.