I've noticed that many amateur games degrade incredibly once they enter mid-game (meaning move beyond opening theory).
There are some great questions and suggestions about improving mid-games, such as strategies to improve positions etc.
Yet, many players with mediocre ratings (myself included) cannot help but make impulsive moves, blunders, simply because they have not approached the move carefully enough.
So my question is this: Does anyone have suggestions for improving mental discipline when making moves? I'm thinking of suggestions such as; examine how your move might weaken positional defence; or, have you observed how many pieces are attacking the square your moving too?
There has to be some methodological way of improving one's game by improving one's mental discipline.