Since this is something I've not yet mastered (or even tried!). I had been meaning to post and ask about it, but I'll just take the opportunity and borrow Danielle's thread.
My question is this; I know you begin a new color at the beginning of a row, and I have watched Amy's video. I am still confused, though, about how to know when to actually start that new yarn so that the very first stitch of the new row will be in the new color. :??