Get out all your clothes and decide which ones you want and don't want. Donate, sell, or re-purpose anything that you haven't worn in a year (that isn't seasonal), doesn't fit or isn't your style.
If you haven't worn it in a year, you won't miss it. Thinking, "I could need this one day!" will leave you thinking you have nothing to wear for most. Clean it out. Someone else could second-love your things.
If you have loads if items that dont fit anymore, don't keep them all to be hopeful. Keep a few of yoir favorites, but pitch the rest. A closet full of clothes that dont fit can be very de-motivating.