I saw a helpful video (don't ask me where but I think on her website) by Jenny Beyer that was very helpful. I think practice helps. There is even a color test that you can take on the computer where they ask you to arrange colors in a sequence (again, don't ask me where I saw and did it). That was an eye-opener. My excuse was that the monitors didn't always show true colors! The wheel is helpful as well and photos and then put on computer is really helpful to me.