It would depend on what you're hunting, where and how (what method). Most of my hunting involves spot and stalk or still hunting where I cover a lot of ground. For me, a good pair of binoculars, some kind of hydration bladder and chaps to repel stickers and burrs are probably the next most important pieces of gear. A few other gear additions would be a good dog (preferably a pointer) for pheasant hunting and some kind of caller (electronic or mouth call) for coyotes and other varmints.