Our new An Effective Development Workflow in Drupal 8 training just made its debut at DrupalCon Amsterdam. An important part of the training is dedicated to shorten the trial-and-error period developers necessarily need to go through when converting their practices from Drupal 7 to Drupal 8: we want that proficient Drupal 7 (and Features) developers with zero, or very limited, Drupal 8 knowledge, gain a rather comprehensive knowledge of Drupal 8 (focused on configuration management) that allows them to be immediately productive when Drupal 8 is released.
As a gift to those who couldn't attend the training because it was sold out, and to all lovers of Drush, Features and code-driven development in general, we are sharing a "Drupal 7 to Drupal 8" cheatsheet that was part of the training materials. Please find it attached to this post, in PDF format.
We still have some printed copies available to give away; find us at DrupalCon and feel free to ask us for one!