Add an Address
If you have mail from an address that you want to add to your address book, open a message and click on the book icon beside the name.
If you don't have mail from the one you want to add, goto Address book>Add, enter all the information and click Save.
Make a List
Goto the Address book and click in the upper right corner on the Select List dropdown. Select New List. Put a check in the box beside the address you want to add to your list and go back to the upper right to click Add. You'll be prompted to enter a name for your list.