Occasionally someone will start a code discussion that should be an issue because there is an action item (Example).
It would be great if you could very easily turn the discussion into an issue without going back and forth copy/pasting. Fortunately GitHub allows pre-filling the form from query parameters:
https://github.com/{owner}/{repo}/issues/new?title=foo&body=bar will open up the new issue form with "foo" as the title and "bar" as the body.