Also, search your home for bits of square-footage that aren't being used, such as a crawl space under a staircase. Hire a handyman to add a small door and turn that empty space into a cabinet.
Consider changing your kitchen seating: Swap out chairs for built-in benches with hidden storage, then hide rarely-used items there.
"Seasonal things that inspire you should be left out as much as possible," Flynn says. "I use a ton of wall hooks in my spaces, mostly to be able to hang up favorite pieces of clothing, which add decorative flair to a room."
In a bedroom, a cluster of favorite flannel shirts can look great on decorative hooks, and the same goes for winter jackets. In summer, hang your favorite T-shirts or swimsuits on those same hooks while the winter items are put away.
This works well in kids' rooms and nurseries, helping ensure that kids wear their cutest pieces before the season ends and they grow out of them.
Use closets well
Maximize closet space by adding shelves up high if there aren't any, then keep a small stepladder in the closet for accessing high items, Luetkemeyer says. Add inexpensive, battery-powered lights to dim closets, and increase shelf space by adding a row of canvas hanging shelves.
In a guest room closet, if you have one, Mathison suggests using two rows of hanging canvas shelves -- one filled with items your guest may need, such as extra towels and soap, and the other left empty so your guest can put out some of the clothes they brought. Then use the rest of the closet for your seasonal things. It will be clear to the guest what space is theirs and what isn't.
If winter items will be hung in a closet, Flynn opts for "thick wooden hangers or sculptural modern aluminum hangers to keep the structural integrity of coats or heavy pants." For lighter summer items, Luetkemeyer recommends slim, foam-covered hangers that take up less space and won't let items like camisoles slip off.
Consider splurging on rebuilding your closets with exactly the shelving and hanging space you want: "This way, every closet in the house can work for all seasons," says Flynn. "We spend a ton of money on our cars and have garages built for them, right? Well, we spend just as much on our wardrobes, so why not invest in a space to store that investment?"
Roll out the racks
Mathison suggests keeping seasonal things like coats in clear plastic garment bags on rolling racks in a basement or attic. They'll stay clean, and when it's time to swap them with the opposite season's items in your main closets, having items grouped in garment bags will make it simpler to transport them quickly back and forth.
Rolling garment racks are easy to find and affordable, but it's important to choose good quality ones so they don't bend under the weight of winter clothing.
Mathison is also a fan of coordinated bins or baskets to organize smaller items (gloves, hats, swimsuits, goggles) in closets. It's easy to move these bins out of your main closet into a basement or attic during the off-season.
Luetkemeyer points out that the change of season is a great time to identify items you don't use and get rid of them. Consider donating sheets or blankets you rarely use to a charity or shelter. Do the same with bulky winter coats and sweaters. You'll save space for seasonal items, and also embrace the meaning of the holiday season.