When you need something from someone, show that you respect them, and make it as easy as possible for them to give it to you. Do the research and the thinking you need to do before you ask them for anything.
No matter how talented you are, or how good your idea is, if you don’t prepare for situations where you have to present it or defend it, you have less chance of succeeding than if you had prepared properly. Preparation minimizes stress and makes it possible to think on your feet. It gives you something to work with and makes any surprises less likely. If there are surprises, you can react to them in a positive way.