What advise would you give someone who is trying to break into product marketing?

Many of us in PMM came from a different discipline, so know that it's very common and very doable! I myself came from an editorial background (I studied journalism and worked for an online magazine),

Project Diversity.  Terrific PMMs can oversee a number of projects at different life stages simultaneously (incubation - insights - strategy - planning - beta / pilot - GTM). This requires great atten