I find Gretchen Rubin easier to take in small doses: a blog post, a podcast. I've been underwhelmed by all her books so far though. I don't really get anything from them or relate to her life. My advice: treat it like pick and mix. Take what you like and leave the rest in the store.
I quit this book when Rubin got judgey about regular soda. It probably wouldn't have bothered me if she weren't so quick to say that her sister has type I diabetes in their latest podcast (...yes, I listen to her podcast, but I might take a break now because I found this bit in the book THAT annoying).