Sharpen
a little every day — one small thing to actually notice.
a different two-second sensory check each day — pitch, shade, count or placement — then a real log
Today's task differs from yesterday's, and from everyone else's on any other day, because it is drawn fresh from the calendar date rather than repeated. What actually counts is the choice you make in the moment, not whether it was right — a wrong guess still logs the day, because the ritual is showing up and noticing, not scoring well.
Concepts: habit, attention.
An interactive you play with one thumb, on Wundr.