In the coat closet here at Rowhouse Livin', this means moving my summer hats to a higher shelf and bringing down my winter caps, scarves, and gloves. Plural, because I'm a cold-blooded person, in more than one sense of the word. This year, I found a hole in an upscale name-brand knit hat, one in a color that's still fashionable this year, and knit in a toasty-warm and soft cashmere and wool. "Curses!" I said when I found it -- until I remembered that I'd literally picked the hat up off the sidewalk a block from my home last year, around midnight when the street was deserted. Hey, free hat! So one of my mending tasks this year is to kludge some kind of repair, likely involving a crocheted flower or star over the hole, and hopefully something that's not Regretsy-worthy.
Hats: Since of course you wear a broad-brimmed hat in the summer, you'll need to move these to the back of your closet now, too. Launder, or clean gently by wiping, or rinse and re-block, depending on the type of hat. Most baseball caps will have washing instructions sewn in. Very importantly, let everything dry completely before putting it away, or you risk creating a mold problem in the closet. And mold is much, much easier to prevent than to eliminate.
And now you're done. Your clothes and linens are switched out for the season and you're set until warm weather returns. Did I leave anything out?