What does this word concentrate mean???

I am not understanding it from my current position. I feel i have very fragile thoughts in my mind.Once i wanted be X and now i wanted to be Y along with X while i can do a bit on Z also. So what am i upto,i have heared of saying "Jack of all trade and King of none". Is this were i am travelling to???. I need to answer it quick before i loose my passion on anything in X,Y,Z.

To me concentration is yet undefined entity. Because at times i feel the concentration should be on what your doing at that particular time not necessarily on what you doing all the time. In other times i think the opposite way.So how do i stop this oscillation???.
There are many question i can ask like this ,,but who can give the answer?? or is it that i am posting just because i wanted to ask these question to myself??

Hmm i am confused...i think in my upcoming posts i will talking of time table to manage these X,Y,Z tasks. Which might bring down my mind to some state of rest.
As said "All I'm saying is that to liberate the potential of your mind body and soul, you must first expand your imagination" in the book "The Monk Who Sold His Ferrari". All I'm saying is that to liberate the potential of your mind of what you want in you imagination.

So i am going to concentrate!!!!!!!!!!!!!!!!!!!
OhWhat does this word concentrate mean?????????????
Recursion??