Google+ Hangout office hours are a goldmine for all webmasters, Google is notoriously bad at giving any information to webmasters that are not asking your absolute basic questions.
A quick note "office hours" is a terrible name for these Hangouts! Whats wrong with "Webmaster Question Time" or something like that?
The great thing about these office hours hangouts is that SEO's and regular people can ask questions and ACTUALLY get an answer from a REAL Google Employee who ACTUALLY knows 100% what the correct answer is and if not will find out, most of the time it is hosted by John Mueller. There are so many questions that most webmasters have unawnsered or have had answered in some far corner of the internet never to be discovered again.
What I intend to do here is what Google should have been doing a long long time ago, documenting all the important questions and summarizing the answers, thus Creating a set of guidelines to help webmaster and others.
There is a total lack of knowledge from many so called top contributors in Webmaster Central, although they mean the best MOST of the time, they have been wrong on so many occasions when questions are not of a standard nature, many top contributors are best at only answering the basics Day-to-Day questions.
This link Office Hours Google+ Hangout Schedule will show you the upcoming hangout dates for the next office hours and also show previous ones. You will be able to submit your own questions as well!