Depression is frequently discussed here in relation to CAH. I don’t have CAH, but my (infrequent) experience of depression does not accord with the ’lessening of productivity’ mentioned here before. I recently heard it better described as "being welded into a cast iron coffin and lowered three miles down into a sea of the blackest ink".

I found this book particularly helpful. It is light and short, and just gives a few basics to help yourself get (and stay) back up again. Just recognising some of the patterns we get into can be enough to spur a small change.

http://www.seashell.com.au/AboutAMBooks_BH.htm