I have also found it really helpful to document my workouts at the gym each day. The 12wbt program shows a range of weights, but to ensure that I am working at my hardest and heaviest, I have a record of the last weight I used. Then each time I try to increase the weight or the reps to get the most out of my workout. Its seems to work much better than just "remembering" or winging it at the time.
So, today being Friday, I have today and tomorrow's workouts to go before I can rest for the weekend. Tomorrows Super Saturday Session looks very scary! I'm defineitely not looking forward to that!