Once your book is published, eventually you will be asked for interviews in the newspaper, blogs, and maybe on radio and TV. If so, write up 10 questions that highlight key points you want to make, cool stories and pertinent research. Give this to the interviewer, preferably beforehand via email.
Instantly you have separated yourself from the pack of unwashed interviewees they talk to everyday. You've made it 100x easier for them because unless you are famous, they won't know enough to lead an intelligent, interesting interview, or at least it will be more difficult.
The best part is you've already done the hard part--writing a book. Coming up with 10 questions to ask is now a breeze.