How to let oneself concentrate?

Maybe you're under too much pressure. Try to relax once in a while You can watch jokes or comedies, relax yourself for a while, and then get into the book. For those that are particularly difficult to remember, you can associate what you want to remember, such as the number that is difficult to remember, and you can think about whose birthday or phone number. The study content is shown like a movie before going to bed every day, and it will be very impressive not to remember to review it the next morning.