It's very important to organize your content in a usable and logical way. Your readers will be frustrated if they cannot find what they're looking for. Their overall experience of your blog is greatly enhanced if you use clear signposts to your content. Luckily, WordPress makes this easy with the use of Categories and Tags.
There can be some confusion about the differences between categories and tags, which can lead to them being used incorrectly. This is partly due to the fact that different bloggers use them in different ways. There is some debate about how they should be used, and some may argue that there are no hard and fast rules. However, I think it's important to establish in your mind some distinction between categories and tags. What follows is my method...