Her Ted Talk and this book are pretty timely given the current culture of toxic positivity and perceiving unpleasant emotions as uncomfortable and unproductive. She pulls ideas from other similar thinkers like Angela Duckworth and Malcolm Gladwell regarding grit and mindfulness as a means to access, process and appropriately label your emotions. A little bit of CBT is also sprinkled throughout the book which I appreciate as someone who benefits from this type of therapy.