Sit in a place outside your house, such as on a park bench or in a café

Stare straight ahead and don’t move your eyes. Concentrate on everything you can see without moving your eyes, including in your peripheral vision. When you have finished, write a list of everything you saw. Then try again and see if you can add to your list. Stretching your ability to focus is good for the brain. Paying close attention like that encourages the brain to pump more acetylcholine, an important brain chemical that tends to decline with age.