I check my bank account and that cures me of block every time.
But just two years and a couple of months doesn't necessarily mean you have writer's block. I've had writer's block for the last 10 years, but still manage to kick out novels and other stuff on a regular basis.
None of the cures or "block breakers," exercises or mind games work for me. I can't trick myself into greasing the gears.
But I do just sit down, focus on what I need to say, then tap it out.
Carve out one hour with no distractions, TV & music off (even if you're used to being plugged in and think you can't write without background noise) just you and the 'puter or pen and paper or chalk on the pavement.
If your home is too noisy or you're distracted by chores there go to the library. Ray Bradbury wrote Faharenheit 451 at the library, or so the story goes.
Think about your characters. You're telling a story about them to yourself--don't mull over what some other person might think. Write a scene that gets you all interested in what's going on.
What causes block? Perhaps you're overwhelmed by the idea of filling up 400 pages. Break it down to one page.
Try breaking up the storyline by putting TV Guide info bites on index cards and taping those to the wall. It's not exactly an outline, but a lot of the time I don't write because I don't know what happens next and I really should.
Hit the 808 section of your library if you've not read it already. Take a few months off and do nothing but guilt-free reading about the craft. Don't worry about working on your book. Be a sponge for awhile and soak up other writers. Books on writing by Orson Scott Card, Laurence Block, and Ray Bradbury can only help you.
You learn writing by doing and by practicing, but also from reading how others get through the process. It's like playing the piano--you learn to play the work of others before trying to compose your own.
Even Mozart had to take music lessons from his dad.
Now...when you're working like mad on your 25th novel, it's overdue by several months, your agent is phoning every hour and your editor is sending guys with names like Guido and Shiv to your door demanding the manuscript and you JUST CAN'T FREAKIN' CONCENTRATE....!!!
Then you can say you have writer's block.