you should ptlrepare for job

Well, that stage of life is really a tough stage to be in because you need to take the right decision for your career. Well, we can only guide you, ultimately in the end the decision shall lie in your hands.
I can see you have mentioned "eg. MBA" , so look if you are a more worldly, outgoing, multi-tasking kind of a person who takes pleasure in leading, managing and organising things efficiently, above all if you can handle pressure, extensive competition and a hectic life smoothly, then MBA is what would fit in your couch aptly.
If you are a person who always finds reasons for anything that happens around, explores things to a huge depth, have an inclination towards research, then a post graduation in your field would match your interest.
Other than these two options, if you are interested in any other kind of stuff like sports, music, art, social work, entrepreneurship, etc. then all these have wide range of options too. Do not restrain yourself from doing anything that you like.
And yes, if at all you get into something that you feel is not forte, then do not worry at all because anything that would be best suiting you, would come your way and anything that you find challenging will actually help you in evolving as a better human asset in the future.
A career can be decided in two ways:
1.) either you pursue what you like to the core (this may sometimes backfire because what you like, May not always like you)
2.) or you pursue something that you don't like but was destined to happen (this may sometimes benefit because in the process you might transform yourself so drastically that get the best opportunity of your life).
These things might sound little philosophical but in philosophy lies your answer.
Chose
1.)what your instincts say,
2.)where you feel your personal characteristics match with and
3.)what you like.
In any particular field, if any two  of these three attributes coincide, opt for that.
Wish you all the luck for your future!!

Do in which you have interest to do something.find your interest