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I'd like to hear more about his system. BTW he was no GM nor even an IM. Just a strong NM.

Interesting.  I basically do a mini-SWOT analysis before each move that's not dissimilar:

Strengths (Power)
Weaknesses (Weaknesses)
Opportunities (Options and Mobility)
Threats (Oddly missing from Adams' list, but perhaps envisioned as a subset of Weaknesses)

Criteria aside, I think the most important thing I do is to repeat this prior to every move -- no matter how solid a combination or sequence of moves I've calculated I always reassess the situation prior to comitting my next move in case I missed something on my previous analysis.  I think it's this aspect of the methodology specifically that has spared me from the largest number or mistakes.

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