A challenge from Maxwell in yesterday's comments got Janel to show us her closet, and now here's mine. I don't feel like I came up with any particularly groundbreaking organizing tactics here, but fortunately my 1920s built-in closet came equipped with cabinets above and drawers below for extra storage.
My biggest issues are in the shoe and bag department, so I use a hanging sweater organizer for shoes and bags instead. I had a difficult time fitting in any more standard shoe racks, so in the back of the closet you'll see stacked plastic shelving for...more shoes. Not ideal, far from perfect, but it's working for now.
I have this to offer from my time working at Navy Boot Camp. One can store their unmentionables in the fishnet bags sold to wash said unmentionables in the laundry. If you lace some shoe laces through the upper corners you may tie them to anything. We store our socks there, too. by installing i-hooks into the bottom of the shelf in the closet we can hang them so that they take up no more room than a suit or dress.