If you’re ordering a new Model S or Model X, Tesla periodically offers a $1000 off your cost.
When you’re ready to order, or anytime you already have a Tesla account, just click this $1000 off – discount. If available, a small confirmation will appear on the web page and the discount will then appear later when you get around to ordering your new car.
As of this writing, the promotion is running for orders placed before January 15, 2017. If it is later than this date, try it anyway – it could still be valid as Tesla has extended the discount in the past.