How should we draw a mind-map in our preparation for the speech?

A、Take out a piece of paper and starting put down every important point you want to say.;

B、Use the outline of the research paper you want to present as the mindmap.;

C、Divide the whole speech into different chunks of information in your mind, put the chunks in a certain sequence and name each chunk with a question. ;

D、Use the office software to draw a diagram so you can remember your speech better.