Day-by-day routes with a hire car, ordered so you never drive the same road twice. Pick by how long you have.
A one-week route with a hire car: north, west, south and east, one big walk, one boat day, one market, and enough beach. Day by day with the order that avoids backtracking.
A long weekend or a stopover: one mountain, one wild coast, one boat or one market, and the best beach on each day. Where to base yourself for a short trip.
Split between the north-west and the south-east, with all the hikes, the wild coast, two boat days, both national parks and rest days built in.