Hello. I agree having a master list of contacts can come in handy!
The easiest way to create a master list of all active contacts is:
1. Click Contacts
2. Click the Contacts tab
3. Click All Contacts and pull down to "ALL SUBSCRIBED"
4. Select all of the contacts by putting check in box next to Email Address
5. Click Actions>Add to List
There you have choice of selecting a current list to add your selected contacts to or to Create List>Click Add
The result is a single list of all of your contacts!