Be a professional.

The difference between amateurs and professionals: The answer is complicated and likely multifaceted. One aspect is mindset—specifically, the difference between amateurs and professionals. Most of us are just amateurs.

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Amateurs go faster. Professionals go further.
Amateurs go with the first idea that comes into their head. Professionals realize the first idea is rarely the best idea.
Amateurs think in ways that can’t be invalidated. Professionals don’t.
Amateurs think in absolutes. Professionals think in probabilities.