Recently I have found immense value on reading theses from past students in other labs and institutions, who have worked on a research topic that is similar to my own. While it can be a pain in the ass to get their doctoral thesis if they are not on ProQuest, they are usually quite informative. As I have seen their thesis's are much more detailed about their methods and experimental analysis compared to their publications. Also some of these theses contain a wealth of unpublished data that can support your own preliminary data or start to give you an idea if you are pumping money down a dry hole.
How often do you folks read theses that aren't from your own labs or students on your committees?