In last week’s panel on B2B media, I asked three experts for their advice on growing a newsletter. I spoke with Mark Stenberg, a media reporter for AdWeek and author of the newsletter Medialyte, Josh Kaplan, who previously helped scale Morning Brew and works with creators like Kinsey Grant and Colin & Samir to develop their brands, and Polina Marinova Pompliano, who writes the wildly popular newsletter The Profile. All three shared their top advice for newsletter writers.