Every suited hand that connects stays; offsuit trims hard to the broadways that still make disciplined folds easy.
Nut potential is everything. Suited aces, pairs, and connected suited hands open wider; dominated offsuit hands are quietly toxic and keep shrinking.
The button is the best seat in poker, and it appreciates with every blind of depth: absolute position on every postflop street of a potentially enormous pot.
Assumes a live-standard open to ~4bb, raise-or-fold. In straddled games, halve your effective big blinds and read the chart at that depth.