I am not so arrogant to say I never get writers' block but I'm learning to call it by different names. Some days it's just laziness and lack of interest in my project. Other days it's strong resistance to work and thinking. Resistance is like a stone wall I have to barrel through--it hurts my head but releases me from the bonds of idleness. I've read that "writing begets more writing," and I believe it's true. It's like priming the verbal pump with a trickle of good sentences. When the block comes in the guise of procrastination there's only one thing to do--sit at my desk, whip out a spiral notebook and my favorite purple pen and start writing. When I encounter the block of badly written sentences and characters that fall flat I have to force myself not to quit writing. If I keep going, tossing my lack of confidence out the door, I find dialogue, characterization, and settings building and scenes stretch out over several pages. Maybe not all keepers but definitely something to work with.
Now I just have to fight through my blocks against revision!