Tips for Preparing for Oral Exam

I find it difficult to prepare for the oral exam.

But I think I can speak more and be more relaxed when I speak a little bit slowly.
I always speak too fast, and my brain works faster than my mouth. I must slow down to make sure I can speak clearly and I can speak and think at the same time.

I jump too much from one idea to another. I must learn to start from one main point and try to link all the other things to the main point when I speak.

I can also learn to describe from the big (overall) thing to the small things. Get into the small details as far I can.