People don't buy drills, they buy holes.

Idea: a bakery that only opens when it rains.

How Duolingo uses streaks to keep you coming back

A breakdown of streaks, reminders, and loss aversion as retention mechanics.

Photo of my grandfather's notebook, full of chair sketches.

A worn notebook page with dozens of hand-drawn chair variations.

Jazz is a conversation, not a monologue.

Pricing: charge for the outcome, not the hour.

At the market, the seller gives away one fruit to create a small debt.

Voice note about reciprocity: a tiny gift makes the buyer feel they owe something back.

Games teach their rules without a manual.

Origami: one sheet, endless forms, zero extra material.

Idea: an app that deletes notes you never revisit.