When I'm eating tacos, I'm not really focused on the structural integrity or an optimal consumption matrix . . . I'm really just jamming them as fast as I can into my food hole. But maybe you're a better person than I.
A writer on Lifehacker.com just released a diagram of the ideal way to eat a crunchy taco to get all the flavors and keep it from falling apart on you. I do the ole soft over hard technique.
This diagram shows how to hold it in the middle, right where the meat meets the toppings. Then you eat one end, then the other end, so that your last bites are the section in the middle.