Common Principle: Eye-Level Shelving, Home Screen, Knife Rack

Case 1: A convenience store shelves its best-selling products at the customer's eye level. Slow-moving products go on the bottom shelf you have to bend to see. Case 2: The first page of a phone's home screen holds the apps used daily, while rarely used apps go inside folders. Case 3: A chef keeps the knife used in every dish on a wall rack within reach, while baking tools used once a month go in an inner drawer.

Write one principle that runs through all three cases in a single sentence. Neither a sentence that fits only one case, nor a blunt sentence like 'you should organize well.'