I went though a period like this but most self help books were crap. Still however, I found a few good ones that i stick with today that DID help me.

For Anxiety I found
"full catastrophe living" by Jon Kabat Zinn and the "Power of Now" by Eckhart Tolle.

Full Catastrophe takes a buddhist view on depression and anxiety and likely it is something that you have never heard before. But an example to give you an idea is instead of saying to yourself "I am so fat" you say "I happen to be overweight at this particular point in time". The first line is like *I am so fat and likely always will be* the second is like *I am fat right now but it doesn't always have to be that way*

The power of now was also excellent. He presents an entirely new way of thinking. Stay in he present. But beyond that his was the first book to suggest to me that the "thoughts" I had in my head, I didn't have to act in conformance with them. My thought was not me. He suggest that there is an "ego" inside all of us that is very self destructive. You don't have to listen to it. You hear it say "you could never do that" and you just laugh and pet Mr. Ego on the head and say, of course I can. I see what your trying to do Mr. Ego. He puts it like you disassociate from your negative thoughts.

Finally a good book that always motivated me is "DO IT" lets get off our butts-- I can't remember the author's name. Peter I think. This book is mostly motivational quotes. It always makes me feel like I can do anything.