Doshi's "1% Rule": never let your openness to your next job fall all the way to 0%, even when extremely busy at work. Keep at least 1% of your energy and time available for inbound opportunities. Doshi names this as a mistake he has made himself — closing entirely to 0% when busy is common among leaders, not just early-career people.
The rule is a mental hack, not a time-management prescription — the actual effort of staying at 1% open is small, but there's "a big psychological difference between being at 0% and being at 1%." At 0%, you've mentally closed the door and stop noticing or responding to signal. At 1%, the door stays cracked enough that you register opportunities and can act on the rare one that matters, without spending real bandwidth on an active search.
See Recruiter Script for Passive Candidacy ("Once-in-a-Lifetime Opportunity") for the specific words Doshi uses to operationalize staying at 1% with recruiters, and Job-Market Openness Spectrum (and Seniority-Based Patience) for the fuller range of "in the market" states this rule sits inside.