First things first. Do you know your personal design style?
Start by gathering design publications and tear or flag the pages that appeal to you emotionally. Do not focus on the details in the rooms, instead imagine the room being in your home and appealing to your comfort level.
Once you have a gathering of a multitude of pictures start to notice the common demoninator. What are the similarities? What colors are you finding attractive? Are the rooms casual or formal? Are they mostly: Traditional, Contemporary, Modern or Eclectic(a mixture of specific styles that work together) All of this is a reflection of your physcological response to a particular design environment. Find the three pages that best represents the specific lifestyle that calls to you.
Congratulations you have just completed the first step in creating your dream space.