Alternate universe.

Pick a character, any character. Snag a Random Plot Device, then put them in some completely bizarre snafu. For me, it helps keep the characters sharp in my head, but I can step away from whatever plot knot I'm banging my head against. Also, it's fun to torment your characters I can sometimes find a new angle or action from him or her, just because they're in some situation that's about ten zillion miles from home.

Other than that -- and I apologize in advance, as hearing this never fails to drive me nuts -- I'd say grit your teeth and pound through it. Set a kitchen timer for 45 minutes, and don't allow yourself to delete anything until after the timer bings. You have to weed through a lot of dross, but sometimes it's just a matter of sheer brute force that brings the good stuff out.

Good luck!