There is a great chapter in Jeffery Steingardens book "The Man Who ate Everything" about making pie dough, It's kind of long, but the gist of it is that he broke up the lard/butter in the flour with his fingers into chunks ranging in size from coarse meal to olives, sprinkle water, mixing with fork, until it gathers into small chunks, then gather up the chunks and squish them together. It's a really good book to read, and i probably missed something important, so check it out