Split Personality?

The Screnzy is in full swing, and to my surprise - given that one week ago my head was so overflowing with 'Crash' I hadn't given 'Space Race' much thought at all - things are going well. Thirty-one pages written so far.

But.

While I have managed to distract myself from 'Crash', I can't say 'Space Race' has my undivided attention.

I made the mistake a few days ago of going over the notes from an old fantasy idea that I'm considering reworking for this year's NaNoWriMo (yes, I know, seven months away...) and now I keep getting interference from that. And there's a lot of interference; I'm considering expanding the original idea into a trilogy. I'd love to do a trilogy.
Trouble is, I shouldn't even be thinking about November yet! Especially given that 'Crash' still isn't finished, and finishing it is one of my Big, Fun, Scary goals (and one I really believe I can accomplish).

And on top of that I've got this angsty telepathy-psychodrama-thing brainworming me. Can't use it in 'Space Race' since that's a comedy, so I've started yet another file for that.

Trouble prioritising, much?