If a twig template has an underscore in the filename, it means that the template can not be viewed directly by going to mysite.com/templatename, useful for template files that are only included or used when there is an entry variable as not having this variable populated by craft will cause a template error.

When actively working on a Craft site, having to clear the template cache manually is cumbersome, here is how to disable it when you're in devMode.

To make it easier for content editors (and frankly, yourself) it is useful to be able to click a link or button right on an article or entry page to go straight to the edit page for that entry, here is how.