Develop a standard style sheet for your web site and link it into all your pages. (Use internal style sheets and/or inline styles for pages that need to deviate from it.) If you work for a corporation, chances are it has already developed font and style specifications for printed materials. Get a copy of those specifications and follow them for company web pages too.
Be sure to explore the official style sheet specs at http://www.w3.org/Style/CSS/ and try some of the more esoteric style properties I didn't mention in this hour.
