Getting and Managing Testimonials from current and past clients/residents

We have had a good year and have had unsolicited testimonials from residents, commercial tenants and PM clients.  

Here are a few questions I have related to this:

1.  What is the best way to ask or receive testimonials from happy customers in general?   Many times people are excited to write a testimonial, but not sure what to write for example. 

2.  With so many places to list testimonials has anyone figured out a way to easily list them on multiple platforms at the same time?   It isn't always easy for someone to leave good feedback due to sign up requirements ect.  Many times we receive an e-mail or something in writing, but of course would like to share this online as well.  We are also looking for technology that can do this as well.