Passion
In today's world following Passion is taken as a very cool thing. And that's why most of the people start following their passion without understanding what is the real meaning of passion. And then fail in it. So before you start to follow your passion ask yourself properly, is this your real passion??, If the answer is yes, then work on it till you get on its peak.
If you want to follow your passion, then promise yourself that one day, you will be the best in that.
