I am going to buy the car as I would if there was no credit. Pick the options I can afford/want and buy the EXACT car I want without worrying about its delivery date (especially if the color I want causes a delay like the red did on the Model S - I don't care, I will wait. )
I have never gotten to custom order a car before, so this will be my first time. In the past it has always seemed too extravagant to custom order a car and pay possibly full MSRP when I could bargain down a car already on the lot. But Teslas all cost the same - no dealer prices to negotiate. So I will get to order the exact color/options etc, I want, it's very exciting!
If I get a credit, it will just be a bonus discount on the car. I have already gotten one full credit on my Volt, so I have already taken advantage of the program.