Surprisingly, there are more RPG blogs out there than I’d initially. One such website goes by the title of Socratic Design, a blog from the author of an RPG called Ember Twilight. I haven’t had time to read the entire backlog, but so far it looks to be of interest to any budding RPG designer, with articles including What’s it like to publish an RPG? and How can Magic be used in an RPG?
If you’re interested in the field of RPG writing, it’s definitely worth having a look at Socratic Design.