Great! Glad you found it useful. 🙂
@biblebee, that question is something that you’ll have to learn with experience. 🙂 I honestly don’t really pay much attention to stops when I’m actually taking photographs. I just adjust my settings till I’ve got the exposure right, and whatever special effects I want, (such as low DOF or motion blur), and then I just shoot. Stops are only really needed when you’re trying to convert your exact exposure settings as you adjust the rest of the triangle. I rarely do the math, I just play it by ear, and adjust till it’s right.
For me, the advantage of being able to adjust exposure in 1/3 stops is merely an easy way to fine tune my exposure, not to aid in mathematically calculating the correct exposure. 🙂