A number of example emails and templates for announcements can be found here.
The following list of items contain information about the various components of running a successful event. The overview is a good place to start to get an idea of what in involved in running an event.
The following list of items contain information about the various aspects of managing a team. The overview is a good place to start to get an idea of what is involved in organising a team.
A collection of guides, reminders and checklists to following when performing tasks like creating accounts or updating email lists and be found here.