The most important skill you can develop is your ability to learn, our field is always moving in an ever increasing pace; is not how much you know but how quickly you can adapt and learn.
Also don't forget that a good deal of our profession is dealing with people from peers, customers and managers. There is always a human being on the other side, if you are a developer in the service industry, think from the clients perspective; if you are giving feedback or doing code reviews take the person into the other side in consideration.
Above all keep a healthy level of humility.
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The most important skill you can develop is your ability to learn, our field is always moving in an ever increasing pace; is not how much you know but how quickly you can adapt and learn.
Also don't forget that a good deal of our profession is dealing with people from peers, customers and managers. There is always a human being on the other side, if you are a developer in the service industry, think from the clients perspective; if you are giving feedback or doing code reviews take the person into the other side in consideration.
Above all keep a healthy level of humility.