Mistakes are merely steps up the ladder.
Enthusiasm is the yeast that raises the dough.
Enter every activity without giving mental recognition to the possibility of defeat.
If you don't have discipline, you don't have anything
Plan your progress carefully; hour-by hour, day-by-day, month-by-month. Organized activity and maintained enthusiasm are the wellsprings of your power.
If you are not making the progress that you would like to make and are capable of making, it is simply because your goals are not clearly defined.