Per the key is navigation. Imagine trying to shop in a grocery store where things we randomly placed on the shelves. It would take 10 time longer than normal to shop. The same holds true for the web. As more information and products fill the Internet cables it becomes critical to have good navigation.
Navigation requires careful design and testing.
Sites can be organized in many different ways. Just as a grocery store can be organized it many ways so to can a website. There really is no perfect system of navigation. There can be as many opinions about this as there are opinions about what is a nice house. I have found two great sites that can help.