Start by packing the Aer Pro Kit around the items you reach for most often. Group similar items together first, then place the items you reach for most often in the easiest-access pocket.
Do a quick test pack before relying on it for work, travel, or a gym day. Carry it around the room, open the main compartments, and check whether your phone, wallet, keys, charger, and other essentials are easy to reach. If something feels awkward during the test, move it before your first full day out.