When I’m enter my local groceries store, the first place I head is the breads, fruits, and vegetables sections, where I look for items on 50% discount because they have to be consumed “soon”. I head there first because pending what is on discount for almost immediate consumption, that will influence what else I will or won’t be buying to a large extent. I might as well know what my new shopping parameters are rather than having to put things back later when I discover these discounted items and give them priority. It’s a system that has worked well for me, and for many reasons far beyond the obvious savings.