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A week of hard work can sometimes save you an hour of thought.
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Fail early, fail often.
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Turn bugs into assertions or tests.
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Red, green, refactor.
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Always initialize from data.
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Test the simple things first.
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Know what it's supposed to do.
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Make it fail every time.
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Make it fail fast.
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Change one thing at a time, for a reason.
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Keep track of what you've done.
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Be humble.
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Throw low, catch high.
