Animation Seisaku Shinkou Kuromi-chan

Both of these titles are about anime production. The main characters even share the same positions. They are a great way to learn how anime is made and the interesting "characters" behind it. Animation Runner Kuromi is shorter and bit older (so some of the information is a little out of date) but is a great quick glance into production. Shirobako is a 2 cour series so it goes much more in depth and includes modern techniques like using 3D. 

Both illustrates how manga/doujin artists do work behind the scenes. 

These two anime directed by Akitarou Daichi are both crazy looks into the entertainment industry with a similar hyperactive style and crazy sense of humor, including snarky commentary by bizarre little creatures in the foreground. 

Both are "anime about making anime" with a "yes we can" spirit to make this complex process happen. Eizouken has emphasis on the creative and artistic process and juvenile protagonists, where Kuromi-chan focuses on the industry and features young adult professionals. Both shows have a positive world view, fast pace, and uplifting message. In both, most protagonists have some odd personality traits considered typical for otaku. 

Both of them show the other side of anime - the process of its creation. Besides the main character in Otaku no Video and in Animation Runner Kuromi works hard to make his/her dream come true. 

The kuromi´s dream was to make animation and for it she entered to the petit´s studio. Anime very similar to Genshiken,with much comedy. 

This recommendation is with specific reference to the 6th/final episode of Golden Boy (Animation is Fun!). If you enjoyed seeing the production process of anime portrayed in anime, then "Animation Runner Kuromi" has a fairly similar theme and plot. Kuromi plays a similar role to Kintaro in the episode, trying to coordinate the work of various staff to race to a production deadline. Different sort of comedy to Golden Boy and not the ecchi, but it in itself is a fun OVA series and expands on the depiction of anime production as given in that particular episode of Golden Boy. 

Same plot based on an animation studio lifestyle. But Animation Runner Kuromi is funnier than ghiblies xD