For me (and many, many others) one of the most important factors in getting control of my eating (and drinking) is keeping a food/drink journal. One of the very best online journals is http://www.fitday.com/. I used to use it a lot back "in the day." They've changed the format a little since I used it last but it looks even better.It takes a little time to get your foods entered, but once they are in there, you can just click them really easy to add them. Mine are still there from 2 or more years ago. You'll get great charts and reports and whatnot. I just can't recommend it enough!
CHALLENGE: Whether you use Fitday.com or just write it down in a spiral, write down everything you eat or drink. I remember sometimes just knowing I had to write it down and put it with my numbers would keep me from blowing it and eating something crappy.
How are you going to journal???