With the passing of the course, it is not something strange that we completely put aside the resources that we have used during the previous months. In this way, both notes like books they remain gathering dust on the shelf. Big mistake, since this type of material can be used again when we need it, a moment for which it does not usually take long.
A very important concept is that of notes. We write (usually by hand or computer) all the points of interest that we will have to study later. When we finish the course we think that we are not going to use them again, but what happens is that on many occasions concepts will be reused. What we have studied is the basics. And to get ahead, sometimes you have to go back a few steps.
When you are in a new course, do not discard the notes that you have written in previous times at the first time, since they could return to be of you. utility. Keep them more or less at hand, since there will be many concepts before which you can use them even to learn more and discover new things. Reusing notes is a great idea to get better notes.
Finally, in the event that you do not have space to continue saving them, it would be a good idea digitize them on some kind of electronic device. They will stop taking up space and you can continue to have at your disposal a useful and, at times, essential document. In fact, there are people who make them directly to the computer in order to avoid having to do extra work.