Looks like a solid list to me!
Except that last one, for me. I don’t need a follow up. If I read your email and intend to respond, you’ll get one. If I didn’t respond, it’s because I (sorry) didn’t determine it worth responding to. If you follow up with a “hey did you read this”, I’m extra definitely going to ignore it.
Everyone is different, so if Joel has found that effective, all good. I don’t say all this to sound all cool, I just say it as a warning that it can be the opposite of effective.