Novel: Day One

Just a note: I won't put any spoilers here...so people who aren't going to read along with it can read here without worry.

Anyway. I started the novel. I'm currently 986 words into it...not too shabby! HOWEVER! There's a small problem. I have one really good story idea in my head (which I didn't spend too much time on) and as I was writing, another one started edging its way in there. Annoying...sneaky... yes. So now I'm not sure what to do. But I'm tired, and feeling kind of sick, so I think I'll try to bang out another couple hundred words so that I've got almost all of today's work done before I go to bed. Then I can let it ruminate for a while.