Okay, I have really been giving this some serious thought, and this is what I'm able to articulate to date:
Patience. Patience with yourself and with your WA. None of this can be rushed, ever. Rushing only sets you back miles and miles.
Remember to treat your WA as a friend first and foremost. I think this helps us to be more respectful toward our beloveds.
Once you have learned a lesson from a hurt, let go if it. It is not worth carrying in your heart. If you do, there will not be enough room for anything positive.
Never, ever use past behavior or statements to beat your beloved over the head with. You wouldn't like it; why would they?
If something is not working, then STOP doing it! Doy! This is the first lesson we should all learn from DR.
Okay, I think those would be my top recommendations.