do ALL that can be done in that day

Do, every day, ALL that can be done that day. There is, however, a limitation or qualification of the above that you must take into account. You are not to overwork, nor to rush blindly into your business in the effort to do the greatest possible number of things in the shortest possible time. You are not to try to do tomorrow's work today, nor to do a week's work in a day. It is really not the number of things you do, but the EFFICIENCY of each separate action that counts. Every act is, in itself, either a success or a failure. Every act is, in itself, either effective or inefficient. Every inefficient act is a failure, and if you spend your life in doing inefficient acts, your whole life will be a failure. The more things you do, the worse for you, if all your acts are inefficient ones. On the other hand, every efficient act is a success in itself, and if every act of your life is an efficient one, your whole life MUST be a success. The cause of failure is doing too many things in an inefficient manner, and not doing enough things in an efficient manner.