During one of my first professional jobs as a DJ in Pennsylvania, I stopped mixing current hip-hop, rap, and reggaeton, and started an 80-minute classic R&B set--featuring the music of Sam Cooke and others. This set received rave reviews from many of my audience members and a few started asking for my DJ name, business cards, and copies of the set I was performing. Although I did not have any of these three things readily available, I took out a sheet of paper and had the inquirers write dow...