Are you willing to do some serious study?
Are you willing to put some effort in it?
Already am
It's great that you're doing serious study. From my personal experience (mostly mistakes), I can tell you that there are two more questions that are vital to improvement:
Are you studying the right things?
Are you studying the right way?
There are no easy answers to those questions, or to anything else in chess for that matter. The short, but incomplete, answers to the questions are:
The right things are those that advance your overall understanding of the game.
The right way to study is actively -- passive learning will not improve your chess.
Those answers contain tons of implications. If you are interested in more about them, just ask.
The OP has to understand that every move has a purpose. Place the pieces in such a way that they attack the part of the board where the imbalances are favourable. And keep an eye on the opponent's attacking possibilities. When castling on different sides, use the pawns to increase the pressure against the enemy king.