Pick up an object outdoors and time yourself for 60 seconds while you observe that object. Try to maintain focus on the object. You'll be surprised at how quickly your mind wanders and how difficult it is to constrain yourself to the study of that object. For instance, a stone. Observe the weight, temperature, color variations, mineral variations, shape, tiny blemishes and differences, and surface debris. When the time is up, try to describe aloud the observations you made. Try again with another object. Lengthen the amount of time and observe a larger object, like a tree. Try to lengthen your attention span while observing.