3. Read a book
No surprise that this point is included. Reading books is a great source of information. As the old saying goes, “Knowledge is power” and you can never have enough knowledge. When you are reading a book, it is also acting as a source of exercise for the brain as its taking in a good amount of information and most of the time you are trying to create a mental image of what’s happening. That’s a great form of stimulant there.