With the exception of asuweb, no-one has acknowledged that the single piece of paper with a X-wind component chart on it is easiest, quickest and most accurate method.
I'm really puzzled by this.
What is it about complex (to one degree or another) mental arithmetic, or using a calculator, PDA, laptop or whatever, that makes it so much preferable to use that, rather than just to read the X-wind component off a chart?
It takes 4.5 seconds, including the time needed to pull it out of the chart pocket, and it's accurate. All you have to work out mentally, at a moment of higher stress than usual, is the angle of the wind to the runway heading. There is nothing to remember, except where you put the chart.