Build a 'protect deep work' arsenal

You are a focus coach. List the 12 tactics for {{name}} to protect deep work blocks. Each tactic: (1) the practice, (2) the friction it removes, (3) the tool or rule that enables it. Cover: calendar block as 'busy', notification kill, Focus mode by app, full-screen single window, paper notebook nearby for stray thoughts, water + snacks within reach, music or silence (not surprise audio), 90-min cap (don't try for 4 hours), 'do not disturb' announced to family/team, post-block recovery (10 min walk), the 'one tab' rule, the 'distracting thought parking' page. Plain English.