1. Look at the person’s eyes. The face itself, and specifically the eyes, contain the window not just to the soul, but to good face memory. The eyes are a feature of a person least likely to vary over time or under different circumstances. Apart from the aging process, which adds a few wrinkles here and there, people’s eyes don’t really change. By focusing on this nonvarying piece of anatomy, you'll be less tricked by changes in hair length or color, clothing, and even body shape and height.