Nothing will liven up a cramped room like white shelving units. If you find yourself in the situation where there always seems to be a bunch of things lying around and your space is limited, you can get a lot of relief with a couple of shelving units. I suggest white because white more than any other color add the impression of space.
It is evident that the shelves will provide additional storage space, for books, trinkets and what nots. Many people who live with clutter are not necessarily lazy, contrarily to what some would believe. It is a matter of organization. This is often seen in children and teenagers, they would pickup their stuff, if they knew where to place it. By providing a nice shelving unit, they can have both some open shelf space and some space hidden by doors where clutter can be tamed. As my mother used to say, everything in its place and a place for everything.
Finding the right shelving unit for your purpose should not be very difficult as there are many, many choices. I have already stated my predilection for white shelving units, but they are available in other colors as well. Or if a particular color is your goal you could buy unpainted units and paint them the exact color that you want. Wood tones are the most prevalent besides white. You will find oak, mahogany, cherry or any other wood color will best fit your room.
If floor space is even so limited that a full free standing unit would be a problem, you might look at some floating shelves. These attach to the wall and leave the floor space open. This amount of free space might not be much, but in a very small room can make a huge difference. It can be used to store floor pillows when not in use for example. More importantly the open space adds the illusion of a bigger room.
Once you have found the type of shelving units that you like, be it a wood tone or a white shelving unit, or you have decided on white floating shelves make sure to measure your space carefully before ordering as it would be frustrating to have your shelves delivered and not fit in the space.
You will find great ideas for shelving units online. Even when you plan to buy in a local store it is a good idea to have a clear image of what we want before setting out to buy.