Not my advice, but a link: Adriel Trott with some suggestions on perfecting your prospective journal articles. It’s nice to see a discussion like this from a philosopher. The first point, clarity, I can never work hard enough at. I also like the discussion on pertinent literature under point 2. I certainly feel the pressure to mount up references.
There’s also an interesting discussion at the end concerning feedback practices and the social side of scholarship. Ideas should be tried and tested before they are written into publishable form. Trott wonders, in an open ended question, whether the higher ed environment is less effective in providing this feedback than it has been in the past.