Hard Times in NaNoWriMo Land

This is the first time, in six years of doing NaNoWriMo, that I'm having trouble getting going with my story. It's quite disheartening. I have no idea what's wrong. I've had better luck being both more prepared and less prepared. I know my characters. I have ideas for plotlines. I just can't get up any kind of steam. Tonight I've been contemplating ditching this novel and starting over; it's only a few days into the month and I know I could catch up. It's just that I don't have any ideas waiting in the wings, either.

I guess I'll have to sleep on it and see how I feel in the morning. Suddenly I have new sympathy for those who have not had NaNoWriMo work out for them.