Full Shipment

Ship one of every shippable item - the whole shipping collection tab, from crops and forage through minerals, monster drops and artisan goods. The method is a habit, not a push: before selling anything through Pierre or Willy, drop one in the shipping bin first, and check the collections tab (shipping) for the greyed-out gaps.

The usual stragglers are the artisan variants (one of every jelly/pickle isn't needed - but each artisan type is), rare monster drops, and the odd seasonal forage you kept eating. Nothing is missable; anything absent just means one more of it through the bin. Also one of the pillars of Perfection, so it's worth doing methodically.