Same way you get to Carnegie Hall. Three steps to repeat read write and edit. Certainly being fluent in the language you have chosen to write in is key and that starts with reading a lot of good writing so you can recognize it if you see it in your own work. If you read Mencken and Thurber and C.S. Lewis and Asimov and Nabokov (careful about translations and careful about assumptions - Nabokov wrote Lolita in English) you will absorb vocabulary and pick up a style that is right for you. There's nothing magic in my short list; I only mean that the more truly great writing you read the better models you'll have. Then write. Write and write and write. I know that writing has made me a better writer in the past four years. I've written close to 1 answers and probably morements than that. I just find it much easier to write now than I did a short time ago. Sadly I can no longer stop writing even within a given answer and have said many times that I can pack 1 words worth of ideas into a concise 15 word entry. But it's embarrassing for me to be asked this question not because I think I'm a bad writer but because I haven't consistently (or even often) carried out step three edit. Rewrite. Take words out unless they are necessary. Use simple phrases where possible. Don't use the same word over and over again unintentionally. I think I write good first drafts on Quora. They made me a Top Writer. I think I'm a 9th percentile writer (though that's obviously as long as I get to pick the group I'm beingpared to whether that's all humans or all Quorans or all the people arguing on the internet etc. Quora has been kind enough to arrive five or six of my answers to be published on Forbes and Slate and Huff Post. I am given whatever time I have asked for to clean up the answer before it goes to one of those sites. And I make lots of changes. I think those answers got lifted into the 94th percentile. And that's good enough. (Note also that if you have a friend who can help or Simon and Shuster will pay someone to help having an editor is invaluable because they have fresh eyes. You can usually reject their edits if you like.) I wish I could write like some other Top Writers or even like Umberto Eco et al. But I wish I could play the piano like Elton John. I just didn't practice enough toe close and there is an outer limit based on natural ability of course.