N

Last night as I lay in bed on the edge of sleep, I suddenly thought of something Vitally Important that needed to be taken care of. Not being in any state for tasks, I reached over for a pen (the pink one I use to record my waking temperature) and scribbled the letter N on the back of my left hand. "There," I told myself, "Now I won't forget."

All day, I've had no idea whatsoever what "N" stands for. But I do remember thinking I should write an N, so at least I know I haven't been visited by a miniature Zorro. Any tips?