You might not be worried about it if you have a small site, but take this website for example. When I started back in 1997, I had very few pages and I was adding only about 2-5 new pages a week. At the time, I tried to be organized, but not terribly hard, as I knew all my articles were in the /weekly folder and I knew all my links were in the /subjects folder. Fast-forward to now, and I've got thousands of pages, tens of thousands. I honestly don't know how many I have in total. And I can tell you that if all my articles were still in the /weekly directory I'd be challenged to find any of them. In fact, I have found myself re-writing articles that I already have simply because I didn't find the first one in search!
Good organization can help both the site's owners/authors and the site's customers. If your site organization makes sense, it will help people find the articles they need to find. In this article I provide some suggestions for how you can get your website organized before you get to the point of looking for a needle in a haystack any time you want to link to something you wrote.
Read the article: Organize Your Site