This is another great post about breaking through that writer's wall!
I know many a times I have ended up staring at the computer screen, knowing all too well what my characters would do, but I do not know how to express it! As with everything, we writers can burn out, and sometimes we are far more vulnerable to it. The brain is a muscle, so to speak, it must be exercised and kept well rested. When you're taking a break from writing, reading can be the BEST re-energizer. Enjoy! :)