For me it was the "looking west" and "looking up" diagrams here:
http://www.iceinspace.com.au/63-405-0-0-1-0.html
plus the
fantastic suggesion by Al here to forget north/south/east/west and just use up/down/left/right as viewed in the eyepiece.
I've recently switched from drift alignment to using Alignmaster. For imaging it's easier, faster and more accurate.
At the ASV dark site we have piers all set up in such a way that I find my polar alignment is almost perfect when I start. So these days it's a non issue....
James