> 1. Delete redundancies. Say it once. That's enough.
  > If you're repetitive, the reader will stop reading
  > and start skimming. (Like you probably just did.)

I stopped reading at this point because it's blatently wrong. Intelligent geeks hate things repeated, but I've found that in the business world if you don't say something at least 6 times it won't get heard.

Know your audience. Decide whether repetition is required. Don't follow overly broad advice blindly.