nanowrimo_lj | How do you guys do this?

I'm just curious. How do you guys manage to figure out what you're going to write for this? I'm still trying to figure out a story idea... should I be worried I'm not as organized on this NaNovel? What should I worry at this point?

I'm a potential first-timer looking forward to this challenge. I planned and started novels when I was much younger and more inspired to be a writer, but could never get passed the first chapter.... and now I'm unsure of what to do for this NaNo Novel...

Any helpful suggestions on a first NaNo Novel? So far, I have only two ideas:
(1) something about job hunting (cuz I'm currently enduring the pains of trying to find a full-time job after graduating from university, and I tend to write better when I base off my life);
(2) something about four guys with magical powers fighting evil in their normal daily lives just after graduating university, and confused about what to do after university (which I have more detailed ideas, but I feel it's so overdone).

Help?