I've been there. For me, having a project, an assignment, or at least some inkling of what I want to shoot seems to help. Just having a camera and some time, and going out to shoot something, anything, whatever, usually doesn't work for me.
I hate to say this, but having the right equipment helps too. It's not at all about the latest and greatest, or the coolest stuff. (But if you have any you can spare, I'm still willing to try it!)
The right equipment is what works for you. I just sold two big DSLR's and some fast lenses that went from 12 to 300 mm. It was a great system and it served me well for several assignments, including weddings, portrait sessions, and my first photo-journalism assignments, but I hated it (the big DSLR's) and got in a slump as far as my personal work went.
The assignments turned out well, but I never felt like taking one of those big freaking cameras out for fun. They just didn't feel comfortable; no fun; too much stuff to carry around; too big; too heavy; too in your face. Carrying that big stuff around in public made me feel nervous as a tree full of elephants, to quote P. G. Wodehouse.
Two months ago I had an epiphany and decided to sell all my equipment - the big DSLR,'s, lenses, umbrellas, reflectors, soft boxes, lights, PW 's, et al. - and got two Panasonic P&S digital cameras - a new LX-3 and a used FZ30. I used to have an FZ-20 and loved it.
I also went back to film for the first time in about ten years - a CV Bessa R3A with a 35 f/1.2 Nockton and a 75/2.5 Color-Heliar. I've spent almost a thousand dollars in the last month on film and processing, but it's been more than worth it. I'm much happier now. I enjoy photography again. I feel like I'm more spontaneous, and I'm much more excited about photography.
My digital photos have more oomph now, and the film is even more oomphier than the digital when I'm in the groove. I'm convinced there's really nothing else like film, all other things being equal. Also, though I'm not absolutely sure there is a direct cause and effect, it sems like my bookings have more than doubled since I made the switch. But that's just me, and I've had more wine tonight than I should have!
Just finished a long weekend of shooting and actually getting paid for it!
Good luck to you! Don't give up! Just try something new and keep on trying!