Writer's Block
Legos aren't that strong.
Writer's block really doesn't exist. It's just you being stubborn about what you put on paper (or the computer). Just knock down that Lego-of-a-block.
Don't be afraid about what goes down. Nobody has to read it right away. Take the time to tweak things to your liking, but absolutely nothing's going to be perfect. So don't build a wall thinking it's possible.