Hi Paul,
I've spent a couple of years 'just shooting stuff', mainly cats (mine and a rescue centers), but thought, like you, I need to do 'something' - anything. So I set about doing a photobook of 50 or so pics taken inside a local cafe. The first 20 (ish) where easy, but after that it gets difficult finding pictures. Just got the book up to Blurbs site this afternoon and its not a bad first effort, not brilliant, but not bad
Really got my photographic juices flowing again that did, so now I'm onto my second - Just random dogs I see around town, see what I can do with that
Just pick a subject you like and force yourself to get out and do it. Do like me and make book or get them framed and printed, whatever, but I found that working towards something solid at the end of it, spurred me on.
HTH