Here are some resources specifically for Magic judges:
Judge Diversity Presentation (PPTX)
(Held at the Swiss Judge Meeting 2014 in Dielsdorf, Switzerland)
(Translated and slightly revised version, held at the Magic German-Speaking Judge Conference 2014 in Limburg, Germany)
All Judge Conference material is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.