This question is too vague for simple answers. What the most important accessories are depend on where and what you are hunting and the time of the year you are doing it. I think the OP and the members here would be better served if the question was what are the must have items to hunt for (Name a Species) in, (name a state or country and the area, mountains, canyon country, high desert etc.) in the, (Name a season of the year)? That way the advice given will not be general but specific to the species, place and time of year.