Write your book before you plan it
I call it the “zero draft,” a term I got from Peter Drucker. Write your book all the way through. Don’t stop for research or to solve presentation problems. Just keep writing till you get it all out. The zero draft will highlight where research is needed and where there are gaps in your knowledge.
Do lots of interviews
Find some experts. Then interview them. Interviews are great because they’re interactive. You can ask follow-up questions. Interviews help you see new possibilities and spark new ideas. They also provide quotable material you can use.
Capture your insights, ideas, and questions
Insights and ideas and questions will spring into your mind. If you don’t capture them, they will spring out just as fast. Use any method that works for you, but don’t let them get away.
Review what you’ve captured
Capturing your ideas, insights, and questions will do you no good unless you do something with them. Set up a system to review regularly.
When you’re done writing your book, you’ll have more than a book. You’ll also have a richer store of knowledge.