I’m an excellent storyteller, and my answer won’t be helpful at all: I find it more instinctive than anything.
If there’s a consciously identifiable technique, though, to what I do, it’s that the instant I decide to tell a story, I have a firm grasp on the core of it, i.e. the reason I think the story is interesting and worth telling. It’s a “thesis statement,” in other words, if you want to call it that – the basic principle that the story is designed to illustrate. It’s not just a collection of events linked by location or cast of characters or whatever: there’s a simple unifying concept.
Then, when I tell the story, I can keep everything related to it. I don’t even need to say it out loud; the story just hangs together naturally because it’s clear in its conception. Again, I don’t decide what the core is; it’s largely instinctive. And my listeners don’t need to know where I’m coming from, because the fact that I’m working from a foundation is subtly conveyed by my storytelling attitude. They know that the story will eventually come together, and that I’m not going to wander around in unrelated tangents, so they listen throughout.
This has been true since I was a small child. My grandfather used to make up “Popeye” stories for me and my brother at bedtime, and, quite frankly, his storytelling skills suck. I always found the stories he created unsatisfying, and as a tactless seven-year-old, I had no problem telling him so. “No,” I’d complain, “Popeye has to fail a couple of times, he can’t just pull out the spinach and win right away.” I didn’t know anything about formal story construction; I just knew that the story didn’t work, and I could point to why.
Now, of course, I have an education and vocabulary that can be used to express those concepts, and formal plot analysis tells me that my grandfather’s stories lacked conflict, reversal, and all sorts of other elements that make stories compelling and interesting. But even with the labels, I’m still not sure I could explain why I know – beyond the unifying concept mentioned above – how to keep a roomful of people spellbound with a twenty-minute narrative, while my brother can’t.