If you're like most contractors Nov-Feb are some of your slower months. Some plan ahead and start early in the summer by offering small yet substantial discounts if customer's are willing wait until the winter months to start their project. The ones that do this have a surplus of work and have been through this slow period before, the other's where happy to stay working during the busy season but now are finding themselves going into winter with little to no work. In general no matter how much work you have winter is just a slower period for business in general. Less daylight, holidays, weather, etc. So this is a good time to tighten up your books and work on future marketing.