When deciding what fonts to use, there are some basic principles to follow that can help you create a clean and readable design. First, do not use more than three or four different types of fonts on a page, as it will be cluttered and hard to read. Mixing fonts is a good idea so your pages don't look flat, but don't make the common mistake of overdoing it. It's rare that use of more than three or four fonts in a design will work. You may want to use fonts from the same family, which means though they make look narrower or bolder, they still share the same basic design elements.