A real black book never puts everyone on the same page. It uses a silent hierarchy:
Buy a high-quality, pocket-sized notebook. Moleskine, Leuchtturm1917, or a simple Field Notes. Write the top 50 names in it. Leave it on your desk. Every time you pick up your phone to text "What’s up?"—stop. Call a name from the physical book. The friction of the analog process makes the interaction more intentional.
