Brooding over the past

Why is life so smooth for some people and full of hurdles for some others.

Whenever I think of all the hurdles and troubles ,heart gets so heavy.
But what is the point in brooding over the past?
Do I ever learn to learn from the mistakes and see that I do not do them again.
Will I learn to tell myself ....Move on dear....and get even more tougher.
Do not ever show your emotions on your face....better yet...do not get emotional over anything!!

And more than anything else, all this is about career....inspite of knowing that career is just a part of life.Why am I so bothered about it?

Just because, I do not have anything else to think of, as of now??

Whatever....Focus on the future and think on how to make it merrier.