When choosing a successful web site design, you must have an outcome in mind. The most common 3 are to make your phone ring (prospecting), sell something (ecommerce) or to impart knowledge (education/brand marketing). There are others.
Many sites use a blend of outcomes.
Always remember to make your desired outcome easy for the visitor to achieve. Place your contact information prominently on the pages. Make ordering easy to do and payments convenient. Remember to include pictures of your product or service in use.