Maybe you read the famous Life-Changing Magic of Tidying Up (or watch the Netflix show), and plan to pull every last thing out of your cabinets, pantry, and fridge to go through one by one so you can out which ones actually, y'know, ~spark joy~ (which in the kitchen, can be stuff that you use regularly but don't like, love *and* stuff that you hold near and dear but use once a year). It's on Amazon for $9.69, or find it at your local bookstore or library.
Or you might opt for something more chill like Un**** Your Habitat, which is filled with humor and empathy and emphasizes the very practical "20/10" method, where you give yourself 10 minutes of break for every 20 minutes of work. It's on Amazon for $11.65, or find it at your local bookstore or library.
Of course, you can also simply line up a few cardboard boxes labeled "keep", "donate", "recycle", and "toss", and make your decisions that way! Or, again, you could skip this step completely — whatever works best for you.