As Sass and Grunt become more and more popular, the demand for such tools while customizing themes increases. This is true with the Genesis Theme as well.
Here is my collection of code snippets I use build child themes in Genesis.
99% of social media plugins are crap. Many are poorly coded, and some only exist as a way to advertise inside the WordPress dashboard. If you’re not comfortable with code, then I would recommend trying Jetpack Sharing. Otherwise, the code below is what I use (when I don’t use Jetpack).