Read some fiction you might not normally read, sometimes you'll find phrases or sentences so interesting in the way they're constructed it's a learning experien

Read some fiction you might not normally read, sometimes you'll find phrases or sentences so interesting in the way they're constructed it's a learning experience. One example for me was reading Charles Dickens. Reading some of his stuff as a child in school was an inferior experience to reading it as an adult. Write a lot, and repeatedly re-read what you wrote (when it's done in its entirety). You'll naturally correct yourself or tune it.