I'm definitely a better father because of a bunch of the self help books I've read. Things like better ways to communicate with my son, more effective ways to transfer knowledge, encourage independence, etc. Other areas of my life have definitely improved too though I agree when people say most self help books could be a blog post and in cases where it's an expansion of a blog post I'll generally just go read that.

With these types of books(and I read a lot of self help) I generally expect to get like 1-2 good pieces of advice/ideas per 200 pages so I generally just scan through them until I hit areas that seem high value then read those areas more deeply. I've read all of Tim Ferriss' books and haven't really gotten anything I can think of from his stuff to be honest they are a bit too general for me but I've gotten some good advice from his podcast though I only listen to maybe one episode in 10 when it is with someone or about something that sounds very interesting and even then I tend to scrub through it since there is a lot of filler in a 2 hour podcast.