Can’t afford TV advertising to drive sales? Don’t fret: A recent survey of 100,000 American households shows that store signs rank second, beating other media, in determining where shoppers will buy. Here are four tips for making an impact with your business sign. Make it visible. The shopper study, conducted by the University of Cincinnati with BrandSpark and Better Homes and Gardens, found that 64 percent of women ages 18 to 24 reported “failing to find a business due to sm