My grandmother made great biscuits...I never learned her method.
I just use a recipe from "The Joy of Cooking" - pretty basic baking power biscuits. I think the main trick is just to not handle the dough anymore than you have to, or the biscuits aren't as flaky.
But the BEST biscuits I've ever made used lard. I had a very old recipe and just had to try 'em once. They were outstanding!