I think the first thing is that the plan you made is simply unrealistic. For example, a student goes to study by himself every night, but because he is a student union cadre, he has to hold a very important activity for a while and is busy late every day. Do you think he can hold on? I mean, people always have the most important task, and this most important task makes persistence the most necessary. If you make the self-improvement plan your top priority within a month or a year, then you can stick to it. In order to learn English, I listen to VOA every day, so I have to give up other plans, because nothing is more important than learning English these days. Another reason may be that you don't realize the importance of self-improvement. You need to keep hinting at yourself and telling yourself that if you don't improve yourself, you will lose a lot. I listen to VOA because I hint to myself that if I want to get high marks in CET-6 and TOEFL, I must listen to this thing, and I can't fall behind for a day. Now I insist. The third reason may be that your method is wrong. You don't have to do the same thing at a certain time every day, because for some people, it is simply torture. You can set the tasks to be completed every day, but you don't have to set the time. Finally, I want to say that you can give yourself some rewards and punishments appropriately. In order to succeed, you must be hard enough on yourself and resolutely get rid of bad habits.