There are many suggestions for how to go about theming field collections and several confusing problems.
The view relationship for Flag module only allows you to set a single flag type as a target, which means only one flag type is available on a views row.
My specific use case is adding flag/unflag links to the /admin/content page which I've replaced by a view with the Admin Views module. I ended up digging around quite a bit through Flag module's source code to pop this one out.
The admin toolbar is a user's first look at Drupal. A complex, cluttered toolbar gives the n00b a sense that things in this site are too much to handle. A clean, well-curated interface that presents content tasks first gives the n00b a sense that Drupal is easy to use. Drupal 8 promises a simplified toolbar that gives the user this cozy sense of belonging.
Ever have wanted to import data into your Drupal site from JSON or a big ol' PHP array? You don't need to sweat all the gory details of matching up nodes and fields and coding massive for loops. Let the Drupal Feeds module do that for you.