I heard a quote a long time ago from an actress who had been acting for a long time. In essence, she said when you don't know where to begin changing your life, start with your sock drawer.
I actually did start with my socks. Sorting them by color and separating the ones I use for walking from my non-athletic socks. I even made a Zip-loc bag for all my Christmas socks. And there were more than I thought. Then I moved on to the closet to take out the XL stuff. Don't need a fall-back plan where gaining weight is concerned.
Today, is Goodwill to get those too big and unused things out of my house forever! Because when you don't know where to start, you can always start with the sock drawer.