Once you have all your folders created (and even if you don't, you can always add more later) you will want to enter your addresses into the appropriate folder. To do this, you simply highlight the folder, then add new contacts (sometimes called "nicknames" or "cards" in some programs). Here you can include information such as name, address, phone numbers, etc. for each contact.

If you already have all your names in one folder and want to move them to your new folders, simply highlight the name and click and drag it to the new folder. This will move the name from the main folder into the new one, eliminating the need to re-enter all the contact information.

If you have a set addresses you want to send the same email to periodically, you can create a mail group (or mail list in some programs). Give the group a name then select the members you want to add to the group. You can select addresses from different folders and add new addresses that are not in any existing folder to the group.

Now that you're organized, happy emailing!