I have one more point that in my experience is very important; Don't be easily satisfied with your own work.
What I mean by this is, that very often I see people do something and it works (or sort of works), so they're happy with their work and don't think twice about how it could be improved, or don't spend enough time testing their code from left to right, to make absolutely sure, that it works as intended. Or maybe UI developers are careless about how things look, even though there's a design specification and they just don't take enough care to follow the specs.
One needs to be brutal to his code to make sure that he's really producing the best result he can. That's an absolutely important key to growth and self-improvement.
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I have one more point that in my experience is very important; Don't be easily satisfied with your own work.
What I mean by this is, that very often I see people do something and it works (or sort of works), so they're happy with their work and don't think twice about how it could be improved, or don't spend enough time testing their code from left to right, to make absolutely sure, that it works as intended. Or maybe UI developers are careless about how things look, even though there's a design specification and they just don't take enough care to follow the specs.
One needs to be brutal to his code to make sure that he's really producing the best result he can. That's an absolutely important key to growth and self-improvement.