What are some writing-related topics I should research and cover?

Hi everyone! Thank you all so much for being a part of my Purposeful Prose Community! I want to be able to cover writing-related topics that will be helpful to all of you, so I want to know, what are the most common issues that you all run into in your writing process? Let me know! We can chat about it or I could possibly cover it in my blog! Feel free to use the members app to let me know what you think, ask questions, and start conversations.