Comment by ptoomey3

https://tenderlovemaking.com/2016/02/05/i-am-a-puts-debugger... is ruby gold for this kind of stuff. As a Ruby developer, probably one of the most impactful "quick tips" I've ever picked up is this:

  foo.method(:bar).source_location 

That is wildly useful when debugging/figuring out where the actual code for some method is at runtime.