Sage Advice D&D - Questions answered by designers
If you've played 5th Edition Dungeons and Dragons, you may be interested in this little gem:
Sage Advice is an auto-generated webpage that collects, stores, and amends official Twitter messages about 5th Edition DnD rules; right from the mouths of designers Mike Mearls (@mikemearls) Jeremy Crawford (@JeremyECrawford) and Matthew Mercer (@matthewmercer), Chris Perkins (@ChrisPerkinsDnD) and others.
It's also completely searchable, and already brimming with 757 pages of Tweets.
If you're confused on a particular rule or interaction, answers and advice are aplenty. And if you don't see your answer, you can ask your own questions via a link on the left hand side of the site, or tweet the above directly - and so far they've been answering a LOT of questions!