This topic is near and dear to my heart. I have seen more authors and presenters talk about infusing humor into your business, your brand, your marketing and the sad fact is that some think it's all about telling jokes.
I love everything you talk about here, but two points jumped out at me:
Poking Fun at Yourself. I find that this puts people at ease and they often will relate and see the humor in what you are saying because they have felt/done/thought the same things themselves. I love self-deprecating humor. It's the great equalizer. One of my favorite comedians, Ellen DeGeneres, does this very well.
Using humor to unite. This is such a powerful one. It's the kind of humor that makes us see that we are a lot alike. That we all have the same dreams, the same fears, the same slightly screwed up perspectives of the world.
What I have to be careful with in my writing, though, is my tongue-in-cheek, slightly (okay sometimes more than slightly) sarcastic style. If a reader doesn't understand that you are exaggerating or if they just don't get it, you risk them misunderstanding or, worse yet, being offended.
I've wanted to write about this subject for a while. You beat me to it. And you did so beautifully!