[BrianG]

NP. Actually, I got that drawing from a google image search using the terms "3-way switch schematic".

A schematic always makes things clearer (at least to me). Wiring diagrams are pretty clear too, but can be a little more confusing since they usually don't show the actual electrical paths in the components themselves. And the real-world wiring at a junction box can be a nightmare to sort out.