trying to understand

That sounds exactly like a scripture out of the Bible! The writer lamented that his flesh and his spirit warred with each other and it made him a miserable man. I guess the way to end the war is to cut the action off at the pass. This is like the scripture that says as a man thinks so is he. So if you want to do certain things then I suppose you must think about doing those things and before you know it you will put actions to you thoughts. Likewise if you are doing something that you don't want to do, then it is said that it takes up to 21 days to break a habit.

Try to have some soul and self searching. Try to think what you have done for the past, then from then on you will realize what your next step to do in your life.

We can't avoid that sometimes. Just know what you want and don't think too much., Maybe you are thinking a lot of things that's why you did it unconsciously. Rest your mind for a while, ask yourself what's wrong and be positive!

Yeah it happens, what you should do is try to know yourself better and be confident in whatever you do, and if necessary take advises from your good mates in situations where you feel like you are kind of lost. Have a nice day.