I think teaching "gateway skills" is an excellent idea. One potential impediment to making it work here (as far as I can tell, this is still the case 3 years later) is that the Core Sequences are essentially prerequisites to understanding most of the content here. In order to successfully bring in new people with differently inclined personalities (including, but not limited to more women), posts on "gateway skills" will need to be accessible to a more general audience. This is certainly doable; it would just require a break from routine.

Another potential benefit of this idea is that it may help current readers develop skills that they are less inclined to develop, and are consequently somewhat lacking in (I would consider myself part of this category).