The third stage of organizing is SORTING. I took months trying to decide if sorting came before letting go or after. It's necessary to see all that you have when you're trying to decide what to let go (Stage 2). But you also need to sort 'like with like' before you start to physically place or organize your things (Stage 4).
The second stage in getting organized (and working on your organizing project) is to LET GO of what doesn't work for you, what you no longer use or need, and especially what you no longer love. Letting go is not just getting rid of things, it's about creating the space and the time and the energy for what you do want.