Some of those are obvious, but in a strange "and yet I haven't thought of it that way" way. Some are reasonable advice.

"You can dissect a cadaver" was genuinely unexpected.

Nothing against specific professional help, like personal trainer, but I think "Hire a coach" belongs more in the "Things to not waste your money on" list.

And last, but not least: "Follow up many times. You won’t make people mad if you’re polite" is just wrong, I'm usually mentally cursing persistent recruiters by the time they follow up for the third (and, thankfully, usually, last) time. I'll report as spam in every conceivable way anyone that goes further than that.