I make my living running ad-supported websites/newsletters. I always like the idea of getting away from ads, and relying on direct support from my audience. I a

I make my living running ad-supported websites/newsletters. I always like the idea of getting away from ads, and relying on direct support from my audience. I am good at building email lists. My business model currently depends on the predictability I've developed with the ads on my site. Do you have any advice for transitioning away from an ad based newsletter to a subscription service?