Space
When arranging your furniture, you need to think about the space that you have to work with. You should find the appropriate size of items to help fill the space without the room feeling too crowded or too empty. Think about how people will maneuver throughout the room. There should be plenty of room to open drawers and cabinets and spread your feet out when sitting comfortably on the couch. Think about these things as you measure the space and consider the size of furniture to purchase.
Organization
The items that people are most likely to purchase when designing a living room include a couch, loveseat, oversized chair, coffee table, end table, entertainment center, and accessories. What you really need to think about purchasing are things that can help you with organization. Disorder in a room can disrupt the energy flow, clutter a room, and cause members of your household to struggle to relax. Purchase bins, a footrest with storage space, and other items that can help you control the level of organization in your room.
Arrangement
The arrangement of the room will be closely related to creating good space in the room, but it can also help control the environment. For example, most designers will tell you to use a circular arrangement in your living room to control the flow and harmony of the room. When creating this arrangement, it's a good idea not to have any chair or back to the door, or you can place a mirror across from the space.
When designing your bedroom layout, it's believed to help you get a better night's sleep when your bed isn't aligned with the door, sharing a wall with the toilet, in front of the window, or asymmetrically aligned in the room. Try drawing the layout of your room on a piece of a paper to help you determine the best place to put your bed and other furniture in the room.