I know what I have to do, but I can't do it. For example, I have planned to install the pebble blog engine on my server. It's presumably very easy: ssh to server, make directory for content writable for user tomcat, edit location in pebble properties file, upload pebble directory to server, edit server.xml to point to pebble.
Why can't I do it? I feel like the people in the Bunuel movie who can't leave the party.
And the blog is just an example. The only coding I managed to do recently is some project euler problems to experiment with Erlang.
If the problem is you are thinking too much in your head, open notepad and simply type out everything your head is saying=) Always works for me.
Last October I was experiencing something similar to what you describe and my life had virtually stopped. Friend of mine suggested I start a "secret" blog on blogspot. I wrote 3-4 super long posts rambling and clearing my head. The next day I got the idea for my start-up and had the best two months of my life in Nov. and Dec. '06.