Ask HN: How does a RDBMS developer migrate to noSQL ?

I am used to seeing data in tables and their relationship via foreign keys. I would like to move on to noSQL (key-value) store. A challenge to me is how to stop thinking about foreign keys and tables and think everything in a single key-value store. Does anyone point to guide/links how to move away from RDBMS mindset to key-value store mindset. Real life examples of moving rdbms schemas to noSQL would be great.