I would just like to offer this point - no matter what type of exercise routine you take up, remember that consistency is the key to success. This is true of cardio work as well as strength and flexibility training.
When I have lapses in my training, my golf game suffers. My back starts hurting and I get more tired on the course.
So keep doing something! And if you find yourself falling short of your master fitness plan remember:
"Just do what you can do in the moment".
But don't quit. Don't become part of the January Effect.