I agree with everything Disgusted has said with the exception of training requency - 4-5 times a week is too much for a natural in my opinion and you'll burn out sooner rather than later.
Training for a natural should be pretty instinctive - if you are tired from the previous day's workout (assuming you're also working a full-time job as well), then don't go to the gym - only go back once your energy levels have returned, usually by the following day. I've been training one on, one off for the last year now and have had better results, am more rested, and have an improved quality of life as well to do other things because not all my time is spent in the gym like it used to be. Occasionally I'll do two workouts on consecutive days depending on what bodyparts I'm doing, but I will NEVER train three days in a row no matter how I feel.
But having said all that, everyone's different and you've got to find out for yourself what works best for you.