Do any of you take photos of areas that you wanna spray before you do it? I do, so that I can take the paper design, cut it out, and paste it onto the area. I find it helps me see the sort of scale I need, and get a (basic) idea how it might look.
I keep all my pics on my memory stick, it also means that if I am out and see somewhere, I don't forget it. Just whip out phone or camera and take a snap, then put it on comp, name it, and leave it for when I am ready for it.