I agree completely.<p>After my last depressive episode, I have fallen into a fairly rigid sleeep-wake-rhythm, which has served me pretty well. When the depression rears its ugly head, irregularities&#x2F;changes in my sleep cycle are usually the first observable symptom.<p>And I have not met a single person suffering from major depression who has not in some way had his&#x2F;her sleep pattern affected by it.