Read a blog post about this exact thing, how an empty fridge is a sign of a good system. It clicked for me after wasting a bag of spinach again. Like @singh.uma said, I pick three dinners now and only buy those veggies. My fridge has like milk, eggs, and the stuff for tonight's stir-fry. It feels weirdly clean and I save a ton because I'm not buying random stuff that just dies in the drawer.