After so many years in this industry, I've stopped trying to make sense of the business levels. Some weeks I know it's going to be quieter than others due to external factors, other weeks I get an unexpected influx of bookings and I can't possible accommodate them all.
I simply write down my financial target for each week and manifest that those bookings will come. Even on the weeks where it looks like it will be a struggle and inquiries are slow, I always get to that target. I've recognised that if I have too much attachment to the figure, and worrying about it, thinking it's not going to happen, then it doesn't.