One of the common areas to place the pieces is underneath the coffee table and in front of the couch. If you do use this scenario all four table legs should fit on the rug and not on the ends. It should have enough length that there will be room on all four ends. It looks very tacky to have table legs placed at the end of all four corners.
You have the choice of using patterns bold colors and other styles that you think would look good in the rooms of your home. Geometric patterns work the best with rugs that are used for decorating. You can also use Navajo rugs for rustic or Southwestern themed rooms in your home.
Lighting is also something to bear in mind when designing your room. The lighting can be from fluorescent bulbs or you can have enough windows to allow more light.