A Halloween contest can get you more lawn care business customers - Here is a novel way to gain more customers this fall, from the Gopher Lawn Care Business Software marketing team. This Halloween, if you have trick-or-treaters that come to your house or business. Why not do this. Take pictures of the kids that are dressed up in costumes. Then when you give the kids their candy treats, include a little business card size ad that is attached to the treat.