Recreation is essential for good physical and mental health. Isolate yourself enough to find some time for what you enjoy. Jot down your ideas - keep a pen and paper with you at all times. This helps you remember things and eliminates the stress of forgetting. Keep priorities straight - keep your perspective clear.
Many minor stresses add up.
Also learn to delegate. Make yourself do it now. Learn to use a delay. When you do have one, do something productive. Nutrition plays an important role in how we feel.