Focus !!!!!!!!

Focus a word which has different meaning. Focus is something which everyone should have in life. But how & on what?? That's the question which we all have to find out. Well, it is not easy to have focus on one thing but if you have focus on one thing then stick to it. But again sticking to one thing is again a human choice. But as we are humans we want to keep exploring & take up many other things besides one. Now in school & college while choosing a subject or a career we need to focus on one thing. But with so many choices how do we focus on one thing. It creates a confusion. But even if we choose one (which is not easy) & stick to it & if we don't get the job required as a fresher in that field /area then we are said to be open in other areas. Then why are we asked to FOCUS on one thing?? Does it not create further confusion & havoc in one's life. First you say focus on one thing despite so many choices then stick to it & then we are asked to take up other things also. There is so much of confusion in your life & the person suggesting it must be more confused / unsure of what he or she is saying. What should be the solution to such a CONFUSION??????