Dailiy Affirmations for Forgiving and Moving On: Powerful Inspiration for Personal Change" by Tian Dayton, Ph.D. is a daybook which is in a handy small format and includes an inspirational affirmation for each day of the year. Although this book was written with a 12 step world view in mind, it is not overbearing on the topic and actually very rarely mentions the 12 steps overtly so if that is not an area of interest for you, don't let it prevent you from taking advantage of this deceptively small book which contains large amounts of wisdom.
I also appreciate that the book doesn't shy away from uncomfortable topics, such as challenging old beliefs, and the difficulty of transforming, changing, and letting go.
I highly recommend this book as both a self-help book and; in it's way, a guide which feels almost alike a friend walking beside you in your life journey.