Any successful presentation, even a thoughtful tome, should have its text organized into an attractive, effective document. Organizing text into attractive documents is HTML and XHTML's forte. The languages give you a number of tools that help you mold your text and get your message across. They also help structure your document so that your target audience has easy access to your words.
Always keep in mind while designing your documents (here we go again!) that the markup tags, particularly in regard to text, only advise ? they do not dictate ? how a browser will ultimately render the document. Rendering varies from browser to browser. Don't get too entangled with trying to get just the right look and layout. Your attempts may and probably will be thwarted by the browser.