Don't pass up a buck you would shoot on the last day... it tooke years to get one but I get one nearly every year now. get away from people, find the deer. especially in heavy pressured areas, hunt the drainages and holes nobody else does.
stay away from cotton, get rain gear with pit zips and leg zips for those uphill dashes. merino base layer works good, down puffy for glassing. get used to changing before you need too. ie layering up when you're about to get cold, and dressing down before a climb. it may seem like a pain but...