Displaying art and organizing objects
I’d stick to 2-3, max 4 colors to create a sense of balance and prevent a room from feeling too busy –for example, 1-2 neutrals and a brighter accent color.
It creates a sense of visual coherence and gives off a calm, harmonious vibe.
If you have multiple functions in one space, use similar tones and textures in your accessories and artwork to help unify the different uses.
I believe there are two ways to display art and objects on a small space’s wall to create the illusion of ceiling height.
If there are only one or two pieces of art next to each other, place them lower on the wall to give the illusion of more space between them and the ceiling.
If you’re hanging multiple objects on a gallery wall, arrange them nearly to the ceiling to draw your eye up the wall.
In a small space, I would try to keep the focus and purpose of the space, by keeping clusters of stuff in set spaces rather than letting it spread out everywhere.
This is especially true in new construction, where there may be no original features or focal points, such as a fireplace.
It also aids in the division of an open-plan space.

Floating Shelves and Art Will Make the Space Look Bigger
With some picture ledges on one wall, a gallery wall above a sofa, or a shelving unit for kitchenware and cookbooks, you can create visual interest, but leave some blank space between them as well.
Make use of every available surface.
Plants can be displayed on windowsills, shelves can be added between radiators, or plug-in lamps can be attached to shelving systems to eliminate the need for standing lamps on the floor.

Utilizing Radiators as a Shelf. Makes Space Seem Bigger
Plan a room not only in terms of furniture placement on the floor, but also in terms of elevation – look up and make use of the wall space.
Often, high space is just left to collect dust and grease, but now we have five really useful pockets of space to store bottles, vases, and other items that aren’t used every day.
Instead of having everything on the ground and taking up valuable space, wall-hung shelves can help you make use of the height of a wall for storage.

Floating Shelves Utilizes Wall Space
String pocket shelves above a sofa to display paperbacks, have shelving run the length of an alcove, or use otherwise wasted space for a shelf, such as the gap between the top of a door and the ceiling (great in the bathroom for storing things like TP and extra towels!).
Consider a wall-mounted bedside table or a small shelf instead if you don’t have much space on either side of the bed.
You could also raise a sideboard off the ground and secure it to the wall, revealing the floor beneath.
Fitted, bespoke cupboards will make the most of every inch of available space, floating cabinets, which can fit into a variety of tight spaces, are also ideal.
The cabinet or storage unit should be the same color as the wall to blend into the background and avoid overpowering the space
Most importantly, be creative and have a good time with it.
It’s your space, so while knowing a few space-saving rules is helpful, you’re the one who will be living in it every day.
The most important thing is to make a space work for your lifestyle, so think about how you use a space, how you move through a room, and what you could do to make things a little easier.
It’s often, only by living in a space that you realize what you truly require for your home.