Hi lawman.
I'm glad to hear that things are mostly going well for you. It sounds like you have been making some very nice progress in your healing. Congrats.

In my opinion the most important tool is honesty. Being honest with ourselves. Honest with how we feel, how we are wounded, how we grieve. Honest about our faults and failures, as well as our triumphs and virtues. Honest about our relationships and our role as a partner. There are many psychological tools that people use for this and entire schools of psychotherapy devoted to it. Even Freud talked of the critical important of reality testing (asking if a thought is actually true). My advice is to continue your work on yourself. Work with your therapist. And strive for complete honesty. That is where the payoff comes from.