According to the reasoning of my previous posts, the best method to improve your unconscious chessmodule is to hire a coach to give feedback on your games. I don't want to spend money for a coach though. I tried if a chessprogram could replace a coach. Since chessprograms don't show WHY a certain move is better, they are of little help. You can only confirm issues you already know. They don't learn you anything new. I assume that chess program writers don't want that anyone knows HOW their chessengine evaluates a position. So they are close to useless for this specific goal.
And thus I will try the next best method, to study heavily commented mastergames. The comments must be given in plain language, not in variants (otherwise I could use a computer myself). I will try to find the moves myself first, to give my chessmodule a chance to err. I expect the comments to give contextual information so I can learn WHY my moves are wrong.