A poor night’s sleep can make you feel foggy and less alert the next day. Why is this? It’s not just because you are tired, it’s also because your brain is hard at work when you sleep. It uses those hours of rest to process complex problems, form and consolidate memories, make connections, flush toxins and rehearses how to do tasks. Without adequate sleep, your brain can’t perform these functions and may not function optimally. The Trick to Sleeping Well Your body needs a comfortable, supportive mattress to rest well. If your mattress isn’t working for you, it may be time to purchase a one that better suits your sleeping position. Back sleepers may prefer a firmer mattress while stomach and side sleepers may favor a softer, more pliable bed. The right mattress will adapt to your weight and the curve of your body while still providing support and alleviating discomfort on your pressure points. Check out the different types of mattresses — innerspring, memory foam, latex, air or water chambers or a hybrid — to see which one may work best for you. In your quest for a better night’s sleep, don’t forget about your pillow, which should also be customized for your sleeping position. Back sleepers may prefer a thinner pillow that surrounds the neck. Side sleepers may like a thicker, fluffier pillow that holds their neck in line. Stomach sleepers need super thin pillows or no pillow at all to avoid neck pain.