It is for such reasons that I always ask my clinical clients first about sleep.  Do they wake up in the morning at approximately the time the typical person wakes up, and at the same time every day?  If the answer is no, fixing that is the first thing I recommend.  It doesn’t matter so much if they go to bed at the same time each evening, but waking up at a consistent hour is a necessity.  Anxiety and depression cannot be easily treated if the sufferer has unpredictable daily routines.  The systems that mediate negative emotion are tightly tied to the properly cyclical circadian rhythms.  The next thing I ask about is breakfast.  I counsel my clients to eat a fat and protein-heavy breakfast as soon as possible after they awaken (no simple carbohydrates, no sugars, as they are digested too rapidly, and produce a blood-sugar spike and rapid dip).  This is because anxious and depressed people are already stressed, particularly if their lives have not been under control for a good while.  Their bodies are therefore primed to hypersecrete insulin, if they engage in any complex or demanding activity.  If they do so after fasting all night and before eating, the excess insulin in their bloodstream will mop up all their blood sugar.  Then they become hypoglycemic and psychophysiologically unstable.