Memorize an image. Look closely at a scene (you can do this anywhere: at work, on the bus, at a coffee shop) and close your eyes. Recall as many details about the scene as you possibly can. The more you practice the better and more attentive to the details you'll become.Another easy way to do this is with an unfamiliar photograph. Look at it for a couple seconds and then flip the photograph over. Recall as many of the details as you can. Repeat this exercise with a different photograph each time. Memory sketches are similar to the memorizing an image exercise. Look at a scene for about a minute and then turn away. From memory, sketch what you saw in the scene, or make a list of the things you saw. When you've finished, compare what you saw with what was actually there.
