It depends on what you want out of life. You only get one go around , so what do you consider being successful? set a goal , and work towards it. The harder you work , the bigger the payoff. love what you do.
There is not a set formula. It is different for different people. Best I can tell you is to follow your passion and find the best route to do that. If you love law, study hard and go to law school. If your passion is something artistic, take some art classes and practice and build your skills.
Well I'm only a freshman but if you like working at McDonalds then nothing is wrong with dropping out..... But if you want to have a good future then stay in school or at least fake your way through it