Having an idea of how you want your web page to look and what you want your web page to look like is the place to start.  Putting these ideas on paper help to bring thoughts and ideas out of the realm of thought and into reality.  

Below are examples of the use of brainstorming in the beginning stages of building a web page.  As you will see, brainstorming, depending on the individual, can range from simple thoughts jotted down to detailed look and content.