I love the way you've applied the principals to DBing. I guess the one that really stands out to me is #4.

Who can save a marraige in trouble without looking at what our part was in the problem.

I'm an ACOA, so I usually have to start a #4 by reminding myself that I'm only responsible for my shortcomings, not the state of the universe! Also have to remember that an inventory is a wish list for self-improvement, not something to beat myself up with.