Go to the website mail.yahoo.com.
Click the Sign Up Now Button ()
Select Yahoo! Mail (it is the one with the purple picture at the top and says "Free!" above the "Sign Up for Yahoo! Mail" button).
Enter in your information.
Hint: You only need to fill in boxes that have a red asterisk beside them, as this example illustrates:
Select a Yahoo! ID. This is the part of your e-mail address that will come before @yahoo.com. It will also be the name you type in when you want to check your mail.
Hint: Many people use Yahoo! for their mail, so you may not be able to get the first Yahoo! ID you try. You may have to try several Yahoo! ID's before you find one that is available. An example of a good user ID that is likely available is joesomebody35 where joesomebody is your first and last name and 35 is your favorite number.
Hint: If you are returned to the form, check to make sure you entered your information correctly, and that you didn't leave any boxes with red asterisks blank.
Congratulations, your e-mail account will be your unique Yahoo! ID followed by @yahoo.com.