Most people would say: doctors, lawyers,... I have different opinion on what we call GOOD CAREERS though. Good Careers are those which which give you happiness and satisfactory in life. Those which do not isolate us from loved people, those which optimize our true ability to make the best use of us to the society and environtment.
Not too many people go through years of college and university and decide on a "short" career - a career is usually a life-long thing (bar illness, premature death, etc.). You can take on as many short-term "jobs" as you like, though.
learn short term software courses courses, get good job . here is one website use full to u foe short term courses http://funadvice.com/r/bjf62097gjs.
A good but short Career....become a rockstar and die at the age of 27 like Brian Jones, Jimi Hendrix, Janis Joplin, Jim Morrison, and Kurt Cobain. :P
athletes and pro sports. thats all that comes to mind for short and good careers.
What do you mean by short?