The concept of 'loss aversion' plays a critical role in decision-making, where the pain of losing is psychologically twice as powerful as the pleasure of gaining.
Another thing I think should be avoided is extremely intense ideology because it cabbages up one's mind...when you're young it's easy to drift into royalties and when you announce that you're a loyal member...and you're gradually ruining your mind.
The most important skill for a computer scientist is problem solving. The ability to formulate problems, think creatively about solutions, and express a solution clearly and accurately.