Cutting a custom set of Spark Plug wires.

It's been ten years or more since I have done it, and I have only done it once. I'm not too proud to say I learned a couple things the hard way.
Thought it might be good to hear some tips and tricks for getting them pefect the first time around.
Wires are not cheap, and I bet a lot of people are a little nervous about doing it themselves.

Hoping maybe you guys might share your best methods and tools for those who haven't done it a bunch.