Know thy product. Know thy customer. These are the first steps any researcher worth his or her salt needs to take before sourcing lists for rental and exchange. Live the product, breathe the product and learn about the product is truly the only way to get the list research process started. Once you have become "one" with the product, you are ready to proceed to the next steps. Depending on how much time you have before your client wants to get into the mail, you have a few options available to offer to it: a complete universe analysis, a reverse usage report or a good old-fashioned list test recommendation based on your list research.