How do I regain my energy?

Lately I have been very stressed out, depressed, and busy. As a result I haven’t been getting enough sleep which in turn perpetuates the depression and the stress. It has become a serious problem for me and has some pretty detrimental side effects such as lack of motivation, forgetfulness and dreaming awake, and very disturbing dreams when I DO sleep. I am having great difficulty getting things done early enough to go to sleep at a good time, then I wake up with the sun, and am too tired and unmotivated to do things in the morning. No ammount of caffiene helps nor do other energy remedies. What should I do?