After taking a look at Heather Solomon's awesome CSS Reference Chart for Sharepoint 2007 (with illustrations!), I though it would be a good idea to translate her hard work into a stubbed CSS document for use in my projects. Keep in mind that I haven't verified whether all of her styles actually do what they claim to do. I simply converted the table into a usable stylesheet. All you need to do is just fill in your custom style elements.
You can download the the stylesheet here[.css] or here[.pdf].