Photo: Julie Blanner

Give Every Cabinet Door a Dual Purpose
Stick a few adhesive hooks to the inside of each one to hang measuring cups, oven mitts or stand-mixer attachments, like Coordinately Yours blogger Julie Blanner did. You could also add a few adhesive plastic folders—the same kind you'd find at an office-supply store—to hold Tupperware lids, or attach a file organizer to keep cutting boards upright and orderly.
Command center for notes and scheduling

Photo: Charlotte Smith/Ciburbanity

Turn the Side of Your Fridge into a Command Center
Charlotte Smith, who runs the lifestyle blog Ciburbanity, created an organizational hub to make getting ready each morning easier. Four sturdy wood pockets organize bills, magazines and other mail, while a dry-erase board lets everyone see upcoming meetings at a glance. A plastic brochure caddy is just the right size for storing grocery-list notepads, and a mason jar attached to the wall means you're never rummaging through a junk drawer for a pen.
Trash bag storage

Photo: Samantha Pregenzer of Simply Organized

Take Out the Trash (Bags)
A cardboard box of garbage bags can easily take up half of the under-sink cabinet space. Free up some room by mounting a paper-towel holder to the inside of one cabinet, then use it to hang a roll of trash bags.
Rethink Even Your Most Awkward Spaces
It seems like a magician's trick: Take a six-inch gap between the fridge and the wall, and with a little DIY know-how, double your pantry space. Mallory Nikolaus and Savannah Kokaliares show you how to do exactly that with their step-by-step guide to creating a pull-out shelving unit. It's just the right size for storing canned vegetables, soups, jars of peanut butter and spices.
Under sink storage

Photo: Julie Blanner

Make Cleanup a Little Easier
Blanner recommends taking half an hour to sort your supplies into labeled bins: everyday cleaners, dishwashing goods, specialty cleaners and miscellaneous. You can easily pull out the bin you need for the task at hand—saving time—and keep tabs on what you actually have, avoiding that whole three-half-empty-bottles-of-Windex thing (and thus saving you money).
Cutting board

Photo: Dexas International, Ltd.

Claim New Counter Space
No matter the size of your kitchen, you can always use an extra prep area. This cutting board fits right on top of the sink and includes a collapsible colander, so you can chop and rinse vegetables all in one place.
Knife storage

Photo: Kate Sable of Etch Design Lab

...And Clear Off Even More
Skip the traditional large-knife block and hang a magnetic strip on the wall to store your knives. (If you have tiled walls, consider a compact butcher's block that attaches to the bottom of your upper cabinets, like the one Etch Design Lab's Kate Sable used.)