"Even now I wonder what I might have accomplished if I'd studied harder"

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You will achieve grand dream, a day at a time, so set goals for each day - not long and difficult projects, but chores that will take you, step by step, toward your rainbow. Write them down, if you must, but limit your list so that you won't have to drag today's undone matters into tomorrow. Remember that you cannot build your pyramid in twenty-four hours. Be patient. Never allow your day to become so cluttered that you neglect your most important goal - to do the best you can, enjoy this day, and rest satisfied with what you have accomplished.

— Og Mandino