The main way to make sure that your furniture works well together is to ensure that there is a common 'theme' running through each and every item that is in a particular space. The theme can be color texture style period of construction or something entirely different.
Less is more. The most important rule to remember when decorating any room is don't clutter. Less really is more. Choose simple pieces and keep the extras to a minimal. What decorations you do use don't over do it but rather select a few quality items.
Choosing furniture is an important part of getting your living room just right. The items that you choose should be coordinated with the colors of the walls and floors in the room but thought also needs to be given to how to mix and match pieces of furniture for the best finished look.