I can SEE the scene I want to write...right down to Remus hunched over a piece of parchment in front of the fire in the common room, but the who, what, why, when and how aren't there yet. It's silly, really, I can SEE Remus there, deep in thought, absently scratching his scalp with the tip of his quill, just like I can see Sirius in an over stuffed chair, one leg flung carelessly over an arm.
He's starting at Remus, but what does he see? What is he thinking about? How old are they? Does Sirius know yet about Remus' condition? Are they alone? Where are James, Peter? Is it slash or gen? Angtsy or not?
I love exploring ideas like this. Hopefully I'll have something worth posting in a few days.