"Use minimalism to achieve clarity. While you are writing, ask yourself: is it possible to preserve my original message without that punctuation mark, that word, that sentence, that paragraph or that section?" This echoes advice I first read in Strunk & White. It remains the most actionable tip for better writing I'm aware of, technical or otherwise. Aside: I consider McCarthy's residency at SFI an ideal job
This is a testament to just how multifaceted he was.