This may sound strange, but I'm often inspired by bad art, at least in my writing.  If I want to write in a certain genre, I'll read something along those lines that I consider to be horrid, which usually sends me back to the keyboard thinking, 'I can do better than that!'  Picking out the flaws also helps germinate ideas.  'No, that should be done this way, or a better approach would be . . . '  Similarly, when I'm in a funk reading great literature simply depresses me as I often think (quite wrongly) that there's nothing more to be said.

I haven't tried this with visual art projects, but it might help.  Look at something along the general lines of what you like to do but which you consider clumsy, unfinished, etc.  Who knows?  You might be inspired to produce a better version of what you've seen.