Not an exhaustive list, of course, but some good things to remember:
1. No one will ever complain if something is too clear.
2. It’s not about you. Just because you don’t like the way something’s written doesn’t mean it’s wrong. As I’ve said before, have a good reason for any change you make. The writer’s voice should be left intact so long as it does not impede clarity or distract from the information.
3. Don’t be a slave to the rules. Think of them as guidelines, and remember that clarity is always more important.
4. Trust, but verify. Always check names, dates, places, times, superlatives — anything you can check, check it. Anything that seems strange or off, check it. For that matter, even if something doesn’t seem strange or off, check it.
5. Math is your friend. Numbers are facts too, and should be treated with the same amount of care and scrutiny.
Next up, because what’s good for the goose, etc.: 5 things every writer should remember.