People design practices for their best week and then abandon them in their worst. The right test is the opposite: what could you still do on the worst realistic day — ill, late, and out of patience? That version is the practice. Everything above it is a bonus.
In concrete terms this usually means under ten minutes and one anchor: one card drawn, three breaths counted, one sentence written. Anchoring it to something that already happens daily — the kettle, the commute, brushing your teeth — does more for adherence than motivation ever will.
Consistency compounds in a way intensity does not. Sixty days of a two-minute practice teaches you more about your own patterns than six days of an hour.