Being overworked and under-rested can often cause bipolar disorder flare-ups, so ensuring that you are getting enough sleep each night is essential. That is easier said than done, particularly when you are suffering from high anxiety levels and other stressful elements of bipolarity. Magnesium is a critical mineral for the body, and also acts as a stress reliever and sedative. If you are deficient in magnesium, it will much harder for your body’s natural cycles to take over and grant you that all-important sleep. Magnesium-rich foods include avocados, bananas, spinach and fish.