I've only read briefly (i'll read in more detail when i've got more time), but those are some helpful things written there. I mean some of it sounds like common sense, but it's so easy to let those things slip out of your mind when you're trying hard to impress / be agreeable all the time.
Yes. Most are just common sense but sometimes it helps to know where to start, what to do, and how to go about it. The hardest part in my opinion is doing these things in practice. For me, the question is when do i start and am i determined/motivated enough to keep working at it.
Doing and saying the wrong things most of the time 24/7. Being me means having to endure people not liking me.