Domain Knowledge
(Cross-posted from Indefinite Articles)
I’m kicking myself for not realizing this earlier.  I’m starting to build an architecture around a new business domain - Pharmaceutical Clinical Trials. I’ve learned quite a bit about the domain over the last few weeks, but I just realized that if I had read the Wikipedia pages on Clinical Trials, I would have had a great head start.
If you’re working in consulting or in any way trying to master a new domain, the Wikipedia probably has some great starting points for understanding the new business.