Additional field in Page node type?

I may lack the Drupal vocabulary to search for this effectively, so if this is thoroughly addressed elsewhere, please direct me.

I have been using the Page node type to create the content pages of my relatively static website.
The trouble is, the structure of my content is slightly different than the Page node type permits, and this introduces complications.

The trouble is, I've got a pre-title and the beginning of my content pages. For example, the title of the page may be "Marketing Strategies," but the pre-title might be something else. But in order to make this work right now, I've got to give the document the pre-title as the actual title, and include the main title in the Body of the page.

What I'd like to know is, how do I add other fields to the Page node type? How can I add a node-specific (e.g., unique to the individual node) pre-title, sub-title, caption, or other content fields? Am I going about this the wrong way?

Please let me know of any suggestions you have, and resources I might have missed. Thanks in advance :)