How do I organize my messages since there are no folders in Google Apps Email?

Instead of folders, Bates Gmail has a “labels” feature. Labels are similar to folders, but are more powerful and flexible, because you can add multiple labels to a message to categorize it in several ways.

For details, see the Google Help Center.

When your existing email is migrated to Bates Gmail, any folders you have created will become labels. Any labels you create in using the web client will appear as folders in desktop email software such as Thunderbird, Apple Mail or Outlook.