The antidepressant effect of sleep deprivation
On the herbals: Fishoil gel tablets work very well for depression, if you don't mind some occasional fish smell. They keep me very clear when I take them. 
Caveat: If you have MAOI inhibitor issues you gotta make sure you can take certain supplements safely. This is a great discussion and the 2nd time I have heard of the positive impacts of sleep deprivation on depression (SD/D). 1st time I didn't buy it because lack of sleep, unless I am working on a project, makes me amped up and close to rowdy. I use the rowdiness to workout, walk, skateboard or bike; all of the above manages depression and  absorbs high energy. Hearing so many intellectual viewpoints on YC makes the SD/D argument more believable.I thought I was the only one with this issue.