Each time I start a design project I realize all of the steps it takes to get from concept to completion. A designer must start with a "vision" for the space based upon the wants and needs of the client while respecting the architecture of the home. The vision for me comes easily. I can see the completed project before me. The accessories are the only variables that are filled in once the art and furniture are in place. It does take courage to create especially for other people.
If you are designing for yourself, I want to encourage you to trust the process and your intuitive skills to choose the right thing. Go to this blog entry to read about developing your style http://kimberleejaynes.blogspot.com/2009/01/decorating-taste-testwhats-your-style.html