I have this problem which I believe a number of posters here do as well, but I have no idea what to do to overcome it. Basically the problem is that I find that I don't have enough motivation or energy for studying during a normal school day at college. I know that it is during your twenties that you are supposed to be energetic and motivated, but somehow I just don't feel it all. There were times when I really did try my best to study in between lectures and school hours and do extra problems not assigned as tutorials, but I become so mentally exhausted by the effort that I sometimes actually fall asleep without realising it during lectures that follow. How many hours of study is recommended from personal experience during school days? Is it possible to study and do problems in between lectures without tiring oneself out? I really envy people whom I've heard are able to work during the day and study through the night continuously. I'm not studying/working part time, so it's rather discouraging to me that these people actually manage to pull that off whereas I fail to do so as a full-time student. I thought of taking health supplements, but I don't want to be dependent on drugs. I believe it's probably possible to mentally motivate myself, but this happens quite rarely and certainly not on a regular basis. What do you guys do to energise and motivate yourself throughout the day and night? I just don't feel I have the energy of someone in their twenties, and it's supposed to get worse as I age.