Business, is it Seasonal?

I've been sitting here for a while now, wondering how I can achieve a sturdy and regular flow of work and business, without having those annoying dry spots that us freelancers have. Then it hit me, maybe this industry is seasonal? Maybe there is no regular flow of work? Then I thought some more.

I was wondering what you thought about this, do you think it's seasonal, or do you think there are sure fire ways to maintain a regular flow of business and work from customers, all year round?