Once you are a registered customer, you will be able to manage your account through the "My Account" tab on the top, right-hand menu. (Notably if you don't see this tab it's likely because you've forgotten to login :o)

There are three areas to your "My Account" page:
(1) Account Information, which allows you to manage your password, e-mail address and billing information;
(2) Shipping Information, which allows you to specify and save as many shipping addresses as you want to use;
(3) Order Information, which allows you to see past orders and track current ones.

If ever something you see doesn't make sense or if ever you have any questions about anything on your "My Account" page, please don't hesitate to contact me.