It's not really a matter of how much you think. Personally, I think there should be two problems: first, you don't want too much, or you don't want too much. Harvest is obtained through labor. Due to the influence of time, energy, ability, enthusiasm and opportunity, a person's gains at a certain stage are certain, and it is often difficult to achieve too much, so don't "think" too much, but less. Second, don't let thinking affect your work. There is so much time. If you think more, you will have less time to do it, and you will get better grades. Thinking is necessary, but it is delayed because of too much time for thinking. Then, even the best idea can't be realized. So "think less and do more". If you have time, you should still think about it, such as fantasies, delusions and fantasies. But you should face the reality correctly and do it without delay.