I am not a plotter. Well that's not true. I can plot the hell out of a story. I've done two that I know every little detail and found that now that I know what's going to happen I've lost interest in them.
So I've become sort of a hybrid in a way. I make a list of things that I really want to happen in each chapter. I want to be sure these points move the story forward, so they need to be in the right order. I consider this a really super light outline. Just enough to know where I'm going, but not to draw myself a complete map of how to get there.
So now that I've got my summary (which has probably turned into a synopsis), my map, my character information, my bible (if I'm writing a series) I am ready to move on to the next step. What else could there be?