Well-fitting clothes are a must. I hate seeing a shoulder gap in a jacket. For a slight premium, consider having your clothes made to order. You can choose from a wealth of fine Italian fabrics and choose you own linings and buttons. Always chose operating buttons for the sleeves. Ditto for shirts. You can choose fit, collars, whether or not you want pockets or French cuffs, and buttons. I’ve been doing the same with belts and buckles. I haven’t ventured into bespoke shoes yet, though one can’t go wrong with Alden, Nettleton, Church’s, etc.