One thing that I've had some clients do it put a tracking code on the last page of a contact page, or on the contact us to place your order page. This was done because several customers were calling their orders in my clients wanted a better way to track this. Most of these clients built separate pages with forms that customers filled out to place order specific questions, this helped control the tracking results.
Also always be sure to put your tracking code on the order receipt page, or what ever page you show your clients once they've actually purchased something from you. Please don’t place it in the shopping cart phase as this could cause multiple conversions and incorrect conversions.
Hope this helped