Keeping an honest boss happy is too easy to do to need explanation.

Keeping a dishonest boss happy is impossible so not worth worrying about.

So I don't really bother with attention on keeping a boss happy. I do my job, I maintain good interpersonal relations with everyone I can (I once had a co-worker I couldn't get along with, but only once), and boss happiness pretty much handles itself in that situation.

I think it comes under the heading of "don't sweat the petty stuff", honestly.

Learn how to get along with people (it's easy), and get your job done. And don't worry about it beyond that.