Have all of your ingredients ready and chilled. Combine the flour, salt and sugar.
Add the butter. Use a pastry cutter or your hands to work the butter into the flour, until it looks like cornmeal and starts to stick together when squeezed. You want to keep some of the butter in pea-sized pieces. If the butter is too soft and it won't stay in pieces, place the bowl in the freezer for about 15 minutes and then try again.
Add the shortening or lard in the same way, making sure to keep everything well chilled.
Mix together the water and vodka and add to the flour/butter mixture.
Stir this with your hand or a wooden spoon, but be very gentle. The goal is to keep the pea-sized chunks of butter in tact.
When most of the flour is coming together, gently fold the dough with a bench scraper into a ball. It should not be perfectly smooth, but, it should also not seem dry or crumbly. If there is still any powdery flour, you can add drops of water to the pie dough. Elongate the ball into a squat log.
Divide the dough into two pieces and create round disks. Wrap the dough in plastic and refrigerate for at least an hour, or overnight.