You should also pay attention to your audience. Who are your audience; what do you want them to know; what is it that they already know; what is new about what you want to tell them and what line of attack have you used to make sure they listen to you? These questions will also be reminiscent in the minds of your audience. Your audience will be professionals in the career as well as aspirants into the career. Professionals will already know much, but students or aspirants will want to know more. Be careful not to claim to know everything about the career and be careful not to prove everything to make mention of.