The last line needs to go BOOM! Your article is meaningless unless the last line KILLS. Read the book of short stories Jesus’ Son by Denis Johnson. It’s the only way to learn how to do a last line. The last line should take you all the way back to the first line and then “BOOM!”
Use a lot of periods. Forget commas and semicolons. A period makes people pause. Your sentences should be strong enough that you want people to pause and think about them. This will also make your sentences shorter. Short sentences are good.
Write every day. This is a must. Writing is spiritual practice. You are diving inside of yourself and cleaning out the toxins. If you don’t do it every day, you lose the ability. If you do it every day, then slowly you find out where all the toxins are. And the cleaning can begin.