Like anything else in life, those who succeed at nonfiction book writing make lists and prepare in advance. By doing research on your topic, such as, your competition, possible titles, and amount of existing research and information available on your topic, you will be better able to approach your manuscript with some solid ideas in mind. Additionally, do not try to retain everything in your head, make many notes and lists as begin and proceed. List ideas and thoughts related to the book as they come to you. Have a recorder or pad in the bathroom, in your vehicle, on your bed stand, in the kitchen and other places where you spend time. Ideas come at the darndest times; capture them before they disappear.