I love that workbook and intend to use it. I will likely start no later than January 2nd though. I'm currently eating "primally" mostly because the last few weeks I was treated to a really bad cold, terrible headaches, joint pain and anxiety which I do attribute to overindulgence. So the day before yesterday I just dumped bread out of my house (except for what my husband eats) and yogurt and a few other items. In 24 hours, I already feel better. I haven't gone over to Whole30 yet but plan on it with the Day-by-Day.
I love the ribbon marker in that book as well. I'll follow along with you but just won't start on the 15th. For me, it's become critical to hose my innards out.
I understand that the cells that are associated with the "gut" gets replaced every few weeks (as compared to other cell sets such as liver and kidney, brain, etc. I want them to reset as soon as I possible can get them healthy again.