I don't know how I feel about the 'avoid retweeting' rule. Admittedly I don't have a huge platform, but retweeting for me has always been a way to introduce my audience to interesting new concepts or people to follow. Ultimately we're stronger as a network, not as individuals.
Also, I'm more likely to take advice on how to 'crush it on twitter' from someone who has achieved that already - this author has around 1700 followers which is fairly modest.