Self-study is a good way of improving our knowledge of things. Some of the great scientists and lecturer couldn't afford to go to school so they just studied at home without anybody's help. Sometimes self-study could be more affective then going to schools and listen to teachers telling you what to do, but sometimes it will be better to learn in schools to furtherly knowing whats going on.
About Self-studyAs adult students in Shanghai TV University, self-study becomes very important. According to me, there are several pieces of tips of self-study. First, I always make a study plan in the beginning of a new semester. Second, preview every unit before the lesson. Third, try to finish the homework after class. Fourth, go over what I have learnt in class regularly at home. Without review, you will absolutely forget what you’ve learnt as quickly as possible. So reviewing is helpful in understanding and memorizing what you’ve learnt.