In your account you can change the information you supplied when registering.
Here you can subscribe to available information and newsletters.
Just use the checkboxes to subscribe or unsubscribe and then press "update".
You can see your previous orders in the section "My account". When clicking on an order you will get more information on the specific order. You can copy an order and directly place it in the checkout.
If you click on the image of a truck in the order overview you will be able to track your order online.