Your Turn: Query Tips?

I'm starting a new feature today on the blog called Your Turn. This is where you can share yoru best practices and lessons learned from your own writing journey. After all, this blog isn't about me, it's about community.

First up, what are your query tips? What have you learned about querying that might help others? What did you do best? How much research did you do before querying? How many query rewrites have you made? Imagine any question possible and if you like, ask your own.

I look forward to reading your responses.