http://www.quicksprout.com/the-advanced-guide-to-seo-chapter-3/
For example, if I want to find an Entity type for a hotel, then search Google with keyword hotel site:schema.org
http://tools.seomoves.org/microdata/?url=tools.seomoves.org%2Fmicrodata%2Fexample%2F
http://foolip.org/microdatajs/live/
ref: