Funny you should post this tutorial when you did J, as I had just printed my first contact sheet earlier in the day
I'd just like to add a couple of tips on usage:
(1) It's very useful for itentifying best photo's at a glance ref. composition, colour etc., and also you can see if there's a strong overall colour cast
(2) Also use contact sheets as a learning tool, i.e. print the thumbnails
including metadata, that way you can see what did or didn't work + why ref. camera settings
I use Picture Project to print the raws, as a starting point. Well, I'm going to from now on, as I found the first one I did quite useful in this regard, and have just printed another of a shoot I did today, so will utilise this method more now. It beats looking at them on the screen, in some respects