I recently read a good article on http://www.thewebdesignerdepot.com discussing the importance of typography and how it equates to customer satisfaction, retention and increased sales. Good typography brings order to the page and increases legibility, allowing people to process information faster. Here are a few tips they suggested and I will reinforce:

Typography has been around since the printed word was invented. The above image is an example from iso50.com, where amazing work is collected, created, and discussed.
Typography: The art or process of setting and arranging types and printing from them.When this definition comes into the mix with web design, we experience why it is such a vital part of the front-end design.