The answer to this question would be too long! But, you could buy a room planner software and play around with furniture arrangement keeping in mind your lifestyle, and number of people in your family. Keep the SCALE of the furniture correct is most important. Beautiful furniture that is too big, or too small for the space never looks good. But here's a tip. Don't buy three piece matching anything. :)

Or the old fashioned way with grid paper and paper furniture to scale.