I have to agree that fasting isn't the best way to lose weight...I decided to start yesterday instead of waiting for January 1st. There are 21 meals (3x/day) or 35 meals (including snacks) in a week. I'm allowing myself 2 meals (New Years Eve and my birthday) to eat what I want but the other times I am tracking, drinking water and walking (or other ways of exercise).
I think if you fast it will make the challenge even more challenging!
Best of luck though!