Meditating, especially mindfulness meditation can help to retrain the brain work better and to not go down certain negative neuro-pathways. Meditation both stress(which helps the brain function beller), but it also increases memory, as well. Find a place to sit quietly, even if only for 15 minutes. Focus on your breathing say to yourself as you breathe"breathing in, breathing out." Whenever you find your mind wandering, gently draw it back to focusing on your breath. As you get better at meditating, notice what is going on around you. feel the sun on your face, notice the sound of the birds and the cars outside, smell your roommate's pasta lunch.