The concept of THE 2 DEGREE DIFFERENCE is that making small changes can make a major difference in your life.
The book is half-story, half-journal. The first half tells a story of a man who turned his life around by small changes, and the second half is a journal so that you, too, can make small changes and reap the benefits.
I have yet to complete the journal (the book is not my personal copy, so I don't feel comfortable doing that), but I really enjoyed the story. In the time since I read the book, I have been on the lookout for small things that I can do to positively impact my life.