What exactly is monk mode?
Between when you wake up and noon: no meetings, no calls, no texts, no email, no Slack, no Internet. You instead work deeply on something (or some things) that matter.
What makes this hack particularly effective is its simple regularity. If someone wants to schedule something with you, it becomes reflexive to respond “anytime afternoon.”
There’s no guesswork or inconsistency: everyone’s on the same page, and you make 3 to 4 hours of deep progress on valuable goals, every day.