What is a very important skil a person should learn

What is a very important skil a person should learn?
With the development of science and technology, the world is no
longer what it used to be. Everyone should master one or more
skills in order to survive and succeed in the world. As far as I am
concerned, the most important skill one should learn is to teach
himself or herself.
To begin with, no one can depend on a teacher in the whole life. In
high school and university, several teachers can teach you physics,
chemistry, biology and so on. But when you find a job and leave
school, few people will tell you how to solve the problem you
encounter in the job. What you can do is to read books and find the
answers yourself. If you do not have the ability to teach yourself, it
is difficult to survive in the world.
In addition, what we have learned in the school is probably not
enough. Nowadays new science and technology develop very
rapidly. Suppose you are majored in computer. As we all know, the
computer science is changing fast. New idea and concept may
appear everyday. Once you stop studying, you may probably leave
behind and even lose your job.
Last but not least, keeping studying can lead you to a high salary job.
If you understand the most advanced knowledge, lots of companies
may hire you, because the more science one can master, the higher
productivity he will have. Do you have a dream to have a good job?
If you do, learn how to teach yourself right now.
So from what has been discussed, one can reach only this
conclusion that teaching himself or herself is a very important skill
a person should learn in order to be successful in the world today.