the Steemit chat is probably one of the best resources I've come across as people can often answer a quick question or point you in the right direction. Apart from that some others i've used include

http://steemd.com
http://steemdb.com
http://steemstats.com

There is also a wiki at http://steemwiki.com/ which is a good resource for newbies with a few solid FAQs.