I don't think its possible to achieve any kind of success all alone. Of course as Baby Angel just now mentioned we can achieve it to certain extent with self determination and hard-work. But in order to reach the peak of success we need the cooperation of people around us- our family, friends, colleagues etc.
yes...for example...
If we want to pass an exam, we should work hard. Even if all others help a lot, we will pass only if we write in our exams. Yes, small goals are achievable..
eg. Creation of a new piece of art, a book/story etc....we should do it by ourself