Answer by Yu An:
There is a famous saying in China:”读万卷书，行万里路” meaning:Read ten thousand books, travel ten thousand miles. And also mean people need combine theory with practice.
So in my opinion read , travel are two ways to make us smarter~
Also have a chinese saying “书中自有黄金屋；书中自有颜如玉” means if you read a lot you will get money and beautiful girl (which imply almost everything). This is said by an emperor to courage people to read. And, You know, Jewish people is the smartest people in the world cause they read a lot.
Travel is a good way to broaden one’s horizon. After seen how big the world is, experiencing different culture different people. The impact will let us improve somehow.
Finally, you have to believe in yourself.