One reviewer said there's nothing new in this book; perhaps they're right. But isn't there 'nothing new under the sun'? What Jim does is package a lot of common sense and sells it to you in a way that makes you think 'Why not me?', 'Why not now?'.
What's perhaps different about the author's message is that he'll berate you for action not taken. Affirmations without actions lead to 'delusion'.
Jim urges us to use emotions such as disgust to bring about change; he gives us a couple of stories from his own life by which he has done this.
Something I hadn't considered before is to use 'Seasons', both of the year and of situations, the ebb and flow, if you like, to their advantage.
I suggest going through the book and highlighting all the 'gems'; one I particularly like is, 'Don't wish it was easier, wish you were better'.