As you get older, you may find you are becoming more forgetful. You don't have to resign yourself to memory loss though. Here are some simple brain boosters to help keep your brain sharp. 1. Go for a walk. Walking is one of the best things you can do for your body, including your brain. Also, some studies suggest physical activity also triggers the release of a protein called BDNF that promotes healthy nerve cells in the brain. That could give your memory a boost. 2. Go Medit