First, congrats on being awesome and getting great feedback!

When I receive great reviews by email - I profusely thank them for the feedback, let them know how much it means to me, and then I often ask the client if they'd be willing to post that publicly and offer a few site links as suggestions. Generally they are more than happy to do that. This may sound simplistic - and it is - but it has also proven quite effective.

I'd be happy to provide some examples - just send me a message.

Make it effortless for your customers to do so. Survey them via email and once they have given you a positive review (use NPS to make it simple through radio buttons) push them to a landing page where they can share their message on the discussion forums you wish to profile their review.

Great question, I was in a similar place in 2014. Since then we've increased focus all efforts to one medium, G2 Crowd. In 2015 we added over 85+ reviews and was voted Top SaaS Customer Experience this Spring! We had amazing company: Google, Slack & Hubspot, were also ranked.

It's an ask at the right time, if the feedback is so great most clients are happy to help. I'd love to share more, email or call!