In the same way that it is important to track your diet and eating plan it is vitally important to track your workout progression.

Are you getting fitter, stronger, more flexible etc. If you are not tracking these things then you might not notice if your workouts are no longer working until 4 weeks down the line. Or you might not realize your strength is not increasing and that you might need adapt your eating plan for more energy etc.
The great thing is that this program has most of this build in and you must just be aware of it and take note. For example you have the weekly fitness test. Are you doing more push-ups each week?
Most of the workouts have challenges build right into them. So are you hitting new targets with each workout?
So be aware of this and track your workout progression and if it is not moving into the right directing contact me so that we can see what the problem might be.