For some people, just having the drop down on the contact form for people to be able to select the recipent is enough. For me, I like being able to have individual pages where people can be directed in order to send emails. This allows you to link to each person/dept's email page from a staff directory page, bio page, etc.
In order to do this, you will need to turn on the Contact Forms module. You will then need to ensure you have the proper permissions to be able to work with this module (» Administer, » User Management, » Permissions).
Create all your "categories" as explained on this page.
Now you just direct people to the appropriate page by using the path www.yourdomain.com/contact/{category}
Note: spaces in your "category" name will be replaced with underscores and all capitals become lowercase letters.
So, if you were setting up a contact form for me (Jenni Simonis), you would name the category Jenni Simonis. Then the address to get to my form would be www.yourdomain.com/contact/jenni_simonis. An example of a live contact page using this system can be found here. You can see that we link to all our contact forms here on our "About Us" page.