First of all, you have to have a small plan, a small goal, such as today I want to learn which knowledge point, how many words I have to memorize today, in a week I want to achieve what kind of effect, math formula memorized how much, if you can't master, then you have to spend more time to think about it, I don't know how much you can grasp of the culture of the elementary school and junior high school, if it's very good then you have to I don't know how well you still grasp the cultural knowledge of elementary and middle school, if it's good then you have to learn the subsequent knowledge well, if you have forgotten then you have to pay more time to make up for the knowledge you had before.
Secondly, for you to say that now at this age you have to continue to learn, I am sure to support you, now the society you have a little more just you have more than others a choice of opportunities, knowledge not only can enrich your brain, but also can make your life become rich and colorful, so that you increase self-confidence.
Finally, I may only be able to give you this knowledge of learning, the other I can not help you what, insist on the beginning of you may be more painful, suffering, but you must insist on it, so you will certainly receive the results of your surprise, and finally, I think of a famous saying: "Birds want to fly high and first wings, people seek to advance first read. --Li Kuchan".