It's an interesting one. I hit the wall and sort of fell into a ditch, which I'm still floundering in. But the PaD means I still carry the camera, still take shots - sometimes of very mundane things (some of which surprise and delight!). Because lots of people know I PaD I get encouragement and ideas and just can't drop it....
What I have dropped is the hour plus PaD browsing and commenting a day. It is the way to get hits and comments and I did go through the phase of 'counting' hits etc - even did a spreadsheet (I know, I know!), but I just don't have the time.
I now have many many less visitors understandably, but still feel part of a great pbase family, and friends/relatives are increasingly checking out the site.
I think it's the same as the feeling when you take pictures you know have been done a million times, often better.... why bother. But then, just in a while something clicks and there's an image you're proud of...
Take a look back over your PaDs, you'll be surprised by how good some are!
I'm continuing for now - because I'm sure things will click in again and when it's good it's really good

Others suggest trying a theme: a colour, things beginning with A, B, C etc, try a few collages (worked for me), bit of macro, flowers (opened up a new world for me), people, candids. I've not missed a day (yet) which is my main motivator at 23.15h on a day when nothings happened! Try some night shots - buy a tripod if you haven't got one.
Good luck

Off to visit your galleries now!