Learning psychologists have proven that taking notes by writing them out longhand helps improve working memory. Longhand notetaking is meant to help students filter all facts and only choose which are important and how to string them together on their paper notebook. This activity helps one learn better and retain information longer in working memory areas of the brain. If you want to keep sharp, better keep a real paper notebook and a pen and use them all the time. A healthy mind also comes from figuring things out while you take notes.