Martin Bell MVP and SQL Bits Organiser, wants to promote the idea of SQL Nuggets. Basically these are 5-10 minute slots on something byte sized (ouch!) at community events where anyone can grab the mike and share their knowledge. Martin has a good example in this article around activity monitor.
So check the article both because it’s useful and becasue it serves as a good example of how you can get involved in some of the community activities Martin mentions.