Let's Brainstorm
"So exactly tell me where do I start now?" Have you ever heard yourself asking this question? Say, you have been brainstorming for a few topics now, but somehow find it so irrelevant. Feeling worried if your topic is too general and not appealing to the audience enough. Now take a piece of paper, and let's start doing some mind-mapping, think of a specific keyword, say car.
You see, you can even talk about the economical factors in the car industry, its historical facts and origins, psychological wise of car in boosting ego and self-image...and the list goes on and on.