SQL Server comes with a bunch of features and services, I have created a poll, please go there and pick all the things that you use from this list below

SQL Server Analysis Services (SSAS)
SQL Server Integration Services (SSIS)
SQL Server Reporting Services (SSRS)
Service Broker
SQLCLR
Partitioned functions/Partitioned views
Database Mirroring
Snapshot Isolation
Replication/Log Shipping
Full Text

It will be interesting to see how many people use some of this stuff
You can also indicate why you use or do NOT use a certain feature

The poll is located here: http://forum.lessthandot.com/viewtopic.php?f=17&t=3087