One way to stimulate your memory and give it a workout is to take a trip down memory lane. Remember a past experience by looking at old photos, watching a video, or talking with a friend. Go through your Facebook timeline. Nostalgia actually feels good for your brain, even if you’re young and the events are fairly recent. That feel-good trigger makes you feel more optimistic and positive about the future. One recent study showed that digging into your long-term memory also helps improve overall brain function and even stimulates your short-term memory. In other words, a little visit to the past can help your brain deal with the present.