If you'd like, you can create different links for each new promotion you do in order to track your success. (mybookcave.com)
This could be a completely different link, or a link showing as an IP address. (littletechgirl.com)
Instead of having you click a ton of different links so I can make a few dollars off your purchase, I want you to get to know me. (thechampagneedit.com)