> "a) Open with an intent, b) Don't lose pieces without purpose, and c) Do everything for a purpose."

I use similar rules when investing, playing poker, and in competitive video games. I'd phrase them as:

- begin with a goal in mind

- take deliberate actions (that you are capable of) that advance you toward your goal

- don't give up resources (money, chips, pieces, hitpoints, etc.) unless that advances you toward your goal