Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A great workbook for anyone who wants to use what he learned

I've read many self-help books and learned a lot of principles from them. However, I don't even have any personal jounrnal after completing those books. Chris is doing really a good job in designing the 21 Days Countdown and let readers to have their potential ability to put into the real world day by day. I wrote my mission statement in life during the countdown, which I have never done before!If you are lack of self review and lack of communication to your heart, get a pen and 21 Days Countdown, follow the exercises and you will find it incredibly work for you.