After your order has been sent out (usually this happens within 24-36 hours after placing your order), you will receive an email updating you that your order has been shipped. A tracking number is available in this email. If you did not create an account during checkout, then you will need to track your order from this email.
You can also track your order by visiting your account page (click ‘account’ to open in a separate window), and clicking “view” on your most recent order. Here, you can view your order status, including the date your order was placed and your order number. Below this is an area titled “Tracking Information”, where you can track your order by clicking the “track” button.