Collaborations are the main way that I have grown my email list. I have found them much more effective than posting on Instagram or YouTube. I manage it all with my Notion Collaboration Scorecard. Which allows me to plan, pitch and apply for collaborations as well as measure and track the results (leads, cost per lead, revenue earned and profitability)
This is just one of the Notion templates and trainings available in my all access pass in Notion for Online Business. It's only $9 a month.