Throughout my career, I have ...

Throughout my career, I have discovered and rediscovered a simple truth.It is this: the ability to concentrate single-mindedly on your most important task, to do it well and to finish it completely, is the key to great success, achievement, respect, status and happiness in life.
Throughout my career, I have discovered and rediscovered a simple truth.It is this: the ability to concentrate single-mindedly on your most important task, to do it well and to finish it completely, is the key to great success, achievement, respect, status and happiness in life.
 Brian Tracy

Quotes from the same author

Your success in life and work will be determined by the kinds of habits that you develop over time. The habit of setting priorities, overcoming procrastination, and getting on with your most important task is a mental and physical skill. As such, this habit is learnable through practice and repetition, over and over again, until it locks into your subsconscious mind and becomes a permanent part of your behaviour.
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 Brian Tracy
There is never enough time to do everything, but there is always enough time to do the most important thing.
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 Brian Tracy
Goals are the fuel in the furnace of achievement.
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 Brian Tracy
Whatever we expect with confidence becomes our own self-fulfilling prophecy.
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 Brian Tracy
You can only grow if you're willing to feel awkward and uncomfortable when you try something new.
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 Brian Tracy