I keep iterating on the things I write and never seem to be satisfied, and see there is always a room of improvements. I don't feel the same way when I read others articles / blogs.
People think if they state their ideas plainly, others will think these are obvious, simple ideas. So they try to cover it up, using big words and long sentences.
Substance comes before style, so first you make your point. Then you chop it down.
(Personally, once I'm done writing, I set out to cut it by 20%)
Kevin Kelly wrote this same advice differently, he said you can't write and edit at the same time.
1. Get a book called Elements of Style by Strunk and White.
2. Internalize the rules in that book and apply them whenever you write.
3. Write as much as you can, and read even more.
Source: I studied English in college