I've created a new categorty for this type of entry: good sense. Christina Wodtke's article is all about that illusive beast. Reading E.B. White's list of reminders with Christina's interpretation for design just reinforces their value to writers.
Here's a quote:
6. Do not overwrite.
Rich, ornate prose is hard to digest, generally unwholesome, and sometimes nauseating.
Beware of gratuitous use of flash, AJAX, and gradients.