I got started when the first chef I worked for turned me on to Larousse Gastronomique. He drove around with a copy in his car.
A couple of years later I went to work for a summer with an old time French chef, who made beef, veal, chicken, and fish stock every week, whether he needed them or not. It was just something he did. That really opened my eyes to what all the books were talking about.
He was one of these guys who, at a critical moment, would say, Hey Joe! (My name is David) Go down to the freezer and tell me how many duck I have in there.. When you got back, he would be sitting on his high stool, waving a cigarette, the Madeira sauce would be smiling in the rondeau, and you didn't know how he did it.
He got really sick with appendicitis and it was actually his gofer, a local kid who looked like something out of Deliverance, who taught me everything he knew about French sauces. I would say, Chucky, you know that sauce chef makes with the red wine? Chucky would put the chef's hat on, imitate his French Canadian accent and show me how. You put red wine to 'ere..and he would point at a rivet in the pan, and boil'em to 'ere.
I was reading a cookbook by Dionne Lucas where she waxes eloquently about a restaurant her son worked at in Vermont and how she had this cute little bake shop that looked out over an herb garden and so on, and I realized she was writing about this place. So I asked one of the old time waitresses if she knew her. She said yes, and the owner never let her make an omelet.
Beyond all that, I learned a lot from Raymond Sokolove's book, The Saucier's Apprentice. And from just watching people. Beurre blanc, a big mystery sauce, right? I watched someone nonchalantly whiz a handful of shallots in the blender with some vermouth, then boil it dry, then beat in a bunch of butter. All done. Very simple. And like Thomas Keller, I learned a lot from making Hollandaise every day. I had a bite of tenderloin with Bernaise today and realized there's a lot of tastes you don't normally get in the course of the day in the bake shop.