First thing when I got this title I was so happy because this title give me chance to share with readers about what I want to change about the world. Maybe my opinion is too mainstream but I take it very serious if I could change the world I will change how people think. Why? People may think why I choose to change how people think. I have my own reason.
Let me start my first reason why I choose to change how people think in the world. I want to change from negative to positive sides. Majority people may not think positive because they might not now the right tools  to use for becoming the right person. For me to be a positive thinker is first you have to change your thoughts by developing good habits, surrounding yourself with positive people and being spiritual. Especially a student. they have to avoid from negative people because in student level is easiest way to become negative thinker because of influence of friends.
For me, real positive thinking works by implementing coping skills. Here are some of my suggestion, we have to always pray, instills positive traits in mind, We also can try hold on the good in life, reflect on what God has done for you, always do self- reflection. Why we have to do self- reflection? I give you one reason. let say we think to say negative or positive perception to other person, before we saying or judge anything from that person, why not if we mirror our self first and we can see from there is that we are perfect or not.
Some one said that "you can't choose if a bird flies over you, but you can choose where it builds it nests" if a bad thought comes into your head,just let it go right out again. "put those thought in a drawer" said that person.
We as a human, must not make the worst of people. especially on judging. We must judge ourselves, and judge of our own act. But not make our word a law to everybody.We must not judge rashly.
If we use the tips of changing how people think together in one world, we live the world with harmony and prosperous.