There is no such thing as wasted floor space in our house! Under the bed and crib- storage, underneath bookshelves- toy bins, in that weird nook between the chair and the wall- blanket bin. Start looking around your home at all of the places that are out of the way yet not being used. My favorite is our use of Oliver's bookshelf. Get on your hands and knees and craw around your house. Any furniture that has legs and doesn't sit directly on the floor can house toy bins or storage. Even a short bed side table can have a magazine tray slid underneath.
If there is a change that it can go on the wall instead of on the floor or a shelf, hang it up. We just got this AMAZING piece from Kevin's Etsy Shop- Roman Reclamation that is so versatile. I know you have seen these mason jars mounted on reclaimed wood before and drooled over them. Do you have one of those bathrooms with a pedestal sink and no counter? One of these mounted by your sink can hold everything a counter would hold. You can also use one in the kitchen for spatulas, silverware, spices, etc. He has tons of different pieces that would make great storage solutions.
There are so many things that people put on counters or in drawers that could be hanging: hats, calendars, jewelry (get rid of that jewelry stand!), pots and pans, dish towels, belts, scarves, ties, books... you get the idea!
I love Holster Holders for decluttering your counters wether that be bathroom or kitchen. I use to be the person with a million things on my kitchen counters. In our old house, I had cute flour and sugar canisters, A large fruit basket, a cookie jar, a basket for Keurig pods, etc. Now I like it clean and simple with as little as needed on the counters! If you are limited in counter space, definitely check out Holster Brand (I saw these white ones on clearance at Target last week!)
This has been the hardest thing for me since our move. My husband and I have always been big readers and lovers of books. We had both kept every textbook from college and every space we could find in the condo was filled with books. It just felt so cluttered. One day we sat down and went through all of our books and decided which ones we felt were worth keeping, and sold the rest. This has made the space feel so much bigger because you can actually see the shelves and tables now!