Do you have a limit on the size of your email inbox at work? Are you sick to death of seeing the "mailbox full" alert, then having to scramble to delete emails to make room?
Here are two simple solutions for you.
First, you can use your "archiving" function. It's automatic and can be customised. When you turn on archiving it separates old items such as emails, meetings, appointments and tasks. As your software archives for the first time it will create a replica of your inbox folder structure.
Two of the parameters you can set are how often the archiver runs through your inbox and how old the items to be separated should be.
For example, you can set it to archive automatically every two weeks, and to take out mail items that are six months old.