Never say anything in writing that you wouldn't comfortably say in conversation. Be yourself when you write. If you're not a person who says 'indeed' or 'moreover,' or who calls someone an individual ('he's a fine individual'), please don't write it.
William ZinsserWriting improves in direct ratio to the things we can keep out of it that shouldn't be there.
William ZinsserNot every oak has to be gnarled, every detective hard-bitten. The adjective that exists solely as a decoration is a self-indulgence for the writer and an obstacle for the reader.
William Zinsser