>>12387180* Play chess (obviously)
Read theory (indentify mating patters, understand the opening and development, study the endgame)
* Exercise (a healthy body is a healthy mind, exercising allows you to stay calm and focus over longer periods of time)
* Analyze your pervious games (identify strengths/weaknesses in your playing style, find mistakes you've made and learn how to deal with them)
If you want to play professionally, get a coach/join a chess club.
