A nagging millstone, or the "still, small voice"? A mild electro-therapy to the brain is said to quiet the internal cacophony and permit its subjects to learn new tasks with greater ease. It sounds like a way to get catapulted right into The Zone. The author reports that the effect lasted for about three days, and that she missed it like crazy when it wore off. If the device were commercially available, she'd "wear one at all times and have two in my backpack ready in case something happened to the first one." But she wonders whether we would be better or worse people without the nagging doubts that we so often hear in our minds.