How do I update my information? (Email address, billing address, shipping address, payment methods, etc.)

Go to My Account > User Details. 

Edit User Details: Click the blue "Edit" button to change your name, email, job title, company or industry. 

Edit Address Book: Click the Edit/Delete options under individual addresses to change existing addresses, or use the blue "Create Address" button to add a new address to your account. 

To add/remove/edit a payment method: Go My Account > Payment Methods.