Personally, I think it sucks to have to lug massive pieces of rough lumber and 4′ x 8′ plywood sheets all the way across a shop. Much respect to basement dwellers who have little choice in the matter. But for those with garage shops, you should think about storing your sheetgoods and solid stock near an entrance. This way when you come home from the lumber dealer, you can back up your vehicle and quickly load the stock into the shop.
Unless you’re a big fan of frequent shop remodeling, planning the layout of your workshop early in its development will save you a lot of time and trouble and also can keep you from spending years in an uncomfortable, poorly organized space. And if you already work in a shop that’s as organized as a trailer park after a tornado, careful planning and a little remodeling is likely to help you make a quantum leap.