Offer discounts to schedule work in the slow season or discounts, if you can schedule at your convenience rather than theirs.
Problem is the slow season is bad weather, our season runs from late march to about middle of november, after that its dead because we can't do the work, we do seal coating, line striping, crack filling, asphalt repairs, asphalt overlays ( we don't do the overlays we sub them out)
BigMack