Graphics: There are literally thousands of clip art graphics available to help represent your business. The right one can go a long way to present your business.
Photos: High quality professional photos are usually the most effective method to insure your ad is seen. In a small community a photo of a business owner who is intimately involved with their business can be an effective part of an ad design. If you have an especially attractive shop you might consider a professional photo of your shop. If you perform a home service you might want to feature an attractive completed job.
Logos: By all means use your logo if it is a high quality meaningful image created for your business.