How to implement a plan?

The most important thing in every game is, implement a plan. Chess is like a war and you cannot win this war without making your plans come true. Before implementing a plan, try to remember these four points:
1) Improve the mobility of pieces.
2) Prevent the opponent from castling.
3) Trade off pawns.
4) Keep the queen on the board.
Always force yourself to implement your plan. No “long thinks” are allowed. Just spent about 5 minutes on a position, and win approximately 10 percent of your game, because your opponent gets into trouble. At class level, spending time and creating a complicated plan is often counterproductive. When you are implementing a long plan, you will surely make a tactical error.