You may have made many plans, but you didn't finish them. At this time, you should check whether your method of listing plans is correct. Your plan should not be just a list, for example, I must remember 100 words today ... I must finish this plan, and so on. You can break these things down into small tasks and make them concrete and feasible, otherwise you may just stare at a "huge" goal in a daze. Step by step, you will gradually love this feeling.
Then you can get involved in the skills of self-control. For example, when you start to relax, you can try to meditate or focus on small things, and you will soon catch your attention. This method can also be applied between tasks to restore your energy.
Finally, in fact, everyone knows what he is thinking. If you have a bunch of snacks or a few smart devices in front of you, it is easy for everyone to be lazy. So take these things out of your sight today. Your bedside may be full of books you have long wanted to read, or plans you have to complete today, thus creating the feeling that you were in the study room or office before.
Personal opinion, you may know more or less, haha, but it is really the most basic.