Which decisions I make today will affect me for my entire life?

The decisions that I will make today that will affect me and my future is stepping up and accepting defeat but only when I have to. I have to stand strong and do all my work while I am in school. I have to be successful and set a goal to accomplish them as well. I will not set a limit for myself. If I set a limit that means I can only go so far with my work and thats is not true. I can do what ever I set myself to do. I will make sure that I complete every task that I attempt to do. The only thing about that is I wont attempt to do it because I will succeed.