It’s always good to keep your mind occupied. For example, I suggest you remember the numbers SV 024721 or EY 0532 or 345678. Regardless of any number and remember it for 3 hours.
This way you put your memory to work, and you manage to remember. By using your memory in this way, you will be able to have an enviable memory and a healthy judgment.
You can make money this way with your mind. You don’t have to work with your back, you can also work with your mind or patience. But it wouldn’t hurt to put your physique to work too, because they are interconnected.