The Library is having a fiction contest and I'm having a fit deciding what story to turn in. I believe I have the perfect one and at the end of the day I edit it and think, "This! This is beautiful". Then I wipe a lonely tear from my eye and go to bed happy.
In the morning I wake up to re-read my amazing masterpiece only to find that through the night some elf broke into my computer to demolish it because now it's crap! So I start over again, or scratch that story altogether, and hunt through my neatly arranged files attempting to find the next available contestant.
I find it. This! This is the one. And once more, I go to sleep happy. But in the morning that nasty little elf has done it again and I'm completely mortified.
So I've decided to deliver my next piece to the library in the evening before it can be destroyed - that'll show the little elffing thing!