One trick that has served me well in the kitchen is to think vertically. I have doubled space in my kitchen by storing things on the walls. I found a long rectangular wooden box, painted it white, and screwed it to the wall, and now it is a great and convenient place to store my spices and things I need to grab quickly.
The wall behind my stove is exposed brick, so i just grabbed some metal hooks and large nails I had loose in the tool box, and pushed them into holes I found already existing in the bricks. It is a great way to hang my skillets and my wok! A magnetic strip screwed under my makeshift spice rack is another great catch-all for knives and utensils I need on hand.
Well utilized kitchen space...
image from California Closets
Storing pantry items in canisters or jars makes them easy to access, keeps them fresh, and the uniformity of the containers instantly adds a look of order. Image from The Kitchn
Even though this kitchen is small, it's compact and set up in an organized way. I love the magnetic spice containers on the fridge.
Image from The Kitchn
Shelves are our friends. Installing shelves is an excellent way to add A LOT of storage space, and allows you to keep counter surfaces clear as workspace. Shelving doesn't have to be expensive either. Image from marthastewart.com
The Ikea Grundtal bars are popping up in small apartments everywhere, the canisters are from Storables, and the galley ledge from Pottery Barn. Image from Not Martha
This idea is really smart, and from none other than Julia Child (thanks Upstart). Outfit a kitchen wall of any size with peg board. You can have it cut to size at a hardware store. After that, you can hang a multitude of baskets, bins, pots, and pans. Top Image from marthastewart.com,
bottom from domino
Kitchen carts can really come in handy for storing small kitchen appliances and provide extra work surfaces. Even better if they're on wheels!
Above two images from marthastewart.com