Dan Roam, in his new book Unfolding the Napkin: The Hands-on Method for Solving Complex Problems with Simple Pictures, shares a series of questions that you can use to refine and improve your visual thinking. This simple process is very applicable to creating and refining the content of a mind map.
Dan Roam publishes workbook companion to his popular visual thinking book
Dan Roam, author of the popular visual thinking book, The Back of the Napkin, has just published a workbook called Unfolding the Napkin: The Hands-On Method for Solving Complex Problems with Simple Pictures.