Shaker testing is utilized in the development of many experimental modal tests. The setup of the shaker, stinger and transducers can cause difficulties that are often misunderstood. Many times incorrect measurements are obtained and the test engineer may not realize that the measurements are not appropriate. This paper overviews some of the common problems that are typically encountered. Measurements are made on several structures to better understand some of the common problems observed. These include shaker alignment, stinger arrangement, reciprocity, impedance head difficulties and many other common issues that must be clearly understood in order to make the best possible overall measurements.