There is a reason why I don't normally participate in things like NaBloPoMo... I'm one that believes that creativity can't be rushed. When you're forced to write every day rain, shine, meteor, flesh-eating mist, dead of night, it gets difficult to cone up with things that are consistantly funny.
And I like to be funny. I'm just not feeling very funny right now. I've had a rough day.
This is also one of the reasons I stopped doing the cartoons... when my brain needs a break to rest I fully believe in giving it one. I sit down to write a few days later, and lo and behold, I am funny again. When I force it, I feel like it's a chore, and my writing suffers.