"Great writing is hard to learn. Good writing is not. All of us have some bad habits that are easily corrected once we understand what they are. This page contains tips to help you identify those bad habits, and write clearly and effectively."
This page is geared for thesis writers but having reviewed it, I find it good information for prose writers as well. Also when writing informally, i.e. forum posts. I find it to be an interesting read.
https://ir.sas.upenn.edu/advising/thesis-writers/editing-tips-effective-writing