strategy

Learn new ideas via study.

Keep track of your mistakes so you can have your most common ones in mind while playing.

In chess, it's usually very easy to know a good move is good... what makes chess hard is that bad moves look good too. So you can fight tunnel vision on bad moves by broadening your understanding (so you'll have good moves as candidates more often), and learning what you're usually being mislead by (so you can discard bad candidates more often).

It will come with time and experience. Dan Heisman has good videos on Chess Thought Processes on his youtube site. Most players use a Candidate Moves technique, where of all the legal moves you can make, you quickly narrow down to a set of 2 to 4 candidate moves that you will evaluate in more detail. Then you select and play your preferred candidate. The skill then comes in selecting and evaluating candidates. Good candidates are forcing or carry some sort of threat, improve your position, contribute to a longer term plan, account for your opponents threats and possible plans. So after every move by your opponent, ask yourself 'what are ALL the things my opponents last move does?' then ask 'what are my candidate moves?' and look at a few responses. After a while it will become habit. Longer time controls help.