Time blocking is a scheduling method where you partition your calendar into fixed blocks dedicated to specific types of work. Instead of managing a loose to-do list, you commit to "9-11am: API design," "2-3pm: code review," "4-5pm: 1:1s." This visual calendar commitment makes time scarce and intentional, reducing context switching and enabling deep focus on difficult problems. Time blocking is not micromanagement of every minute—it's strategic reservation of your most productive hours for your most important work. The calendar becomes a contract with yourself.