What is the difference between writing an initial discussion post and a response to one of your classmates?

Imagine that you have been asked to speak to your classmates and share your most helpful strategy for college-level writing. What would that strategy be?When you write, what is the difference between writing a paper and writing a discussion post? How does the writing process differ for these two types of assignments? Furthermore, what is the difference between writing an initial discussion post and a response to one of your classmates?