On a page, when a form, detail, table, map etc are placed on a page, have a Rich Text Box that could be filled out and when there is content in it, have a question mark show up after the name, something like this (but styled better). When clicked on, a pop-up appears with the help text. This would be useful for many things like directions that you don't want taking up space on the page.
The Help Text could be an input field in the Options section