Neurological conditions affect over 3.4 billion people around the world, making them the leading cause of illness and disability worldwide. However, many people don’t know what they can do to keep their brains healthy. Most people only start worrying about things like memory loss after they start forgetting names, appointments, or where they left those gosh darn keys. You don’t have to (and shouldn’t) wait until these memory lapses happen. There are some everyday habits that can have a significant impact on cognitive function. Here are eight such habits that have been backed by science.