Block associations

Our block of Underhill is looking to start up a block association. Im good at follow up but I am not good at starting it up. I was wondering if there is anyone out there who belongs to one (or is an officer for their block assoc.) can answer a few questions for me such as

How did you start yours up? How should a typical meeting be conducted, etc. Do we need to register our association and if so is it with the precinct or with the community board.

I would be willing to spring for a brunch, lunch or dinner if I could "pick your brain".