How can you cut your three email servers down to one? Can it be done? You bet.

If you're like most people, your data storage has outgrown its current parameters. You deploy more servers - you need more storage. Welcome to the vicious cycle that results from technology.

Luckily for you, a number of companies have realized your quandary and have found ways to consolidate your growing problem. A number of white papers are available that address how to consolidate and survive.
A few standouts:

Informit.com: This one explains how to consolidate different areas of your business.

Hitachi: A solid look at how to consolidate and reduce management needs.

Storage IT World: A great little case study, complete with best practices, things to avoid and tips for successful consolidation.