Here is a GREAT introduction to the entire community!

Here are some groups to join.

* If you're new to Salesforce, Success - Getting Started:

* If you're looking to drive adoption and value, Success - Maximize Adoption:

* And if you want to get the most out of our releases, Success - Release Readiness:

Plus, look into joining a local user group - these have regular meetups where you can connect in person with other Salesforce users in your region.