Succes is the sum of planned actions.
With a plan in your pocket, you have a well thought-out training process that you can adapt to your needs at any time. For certain days on which you have much time for training, create a fixed schedule that contains all the essential content. Your Training always should be based on a warm-up, a main training part and a cool-down at the end of your training. For some days when you don't have much time left, make a fixed quickly workout-routine or do some repetitios of a Kata in such days. So you keep moving.