Concentration is a skill that needs to be trained, rather than a habit that needs to be maintained. Passive activities that aid in concentration involve becoming more comfortable with boredom and reducing exposure to digital distractions. Almost any hobby can serve as passive training by requiring full attention without the use of screens. Active training involves practicing maintaining focus on difficult tasks, such as deliberate practice in sports or solving puzzles in chess. By developing comfort with boredom and practicing concentration, individuals can improve their ability to focus on cognitive demanding tasks in their professional lives.