As I mentioned in a recent journal, I've finally broken down the mental barriers and begun uploading stuff from my 'out tray'.
What happened to me was that the longer I'd been on dA the more selective I was about what I'd submit. I'd also somehow got it in my head that I shouldn't submit too many things close together.
That didn't turn out to be very healthy. I ended up with a massive backlog, and it kinda scared me off from making new stuff until I uploaded what I had. Stupid stupid stupid.
So as part of my reboot I've been submitting three deviations a day until my out tray is cleared. Not all of them are epic, but it's a good feeling to finally be comfortable with that again.