If the embedded video above doesn't work see it here on YouTube.
My friend Thomas Winterstein, who also works in pen and ink, found this video of artist George Pratt working through a pen and ink sketch. There's an intro by someone named "Academy Guy" that's a bit loud, but 54 seconds in Pratt starts to work and it's fun to watch him.
The video seems to be an edited clip from a tutorial CD by Pratt. At the end of the video there is a website to go to, but I'm a bit confused because I immediately saw other Pratt videos pop up on YouTube and they all direct you to TheArtDepartment.org. (I went to that site and maybe my eyes are failing me but I couldn't find where the videos were for sale. If you do maybe you could write in and explain that bit in the comments.)
In the meantime, go check out how Pratt approaches a pen and ink sketch and then poke around for other videos from him. You can also visit George Pratt's website and read about him on his bio page.
When I checked out his site I had trouble clicking through to certain pages as some connections seem to be broken, but give it a shot. (Maybe it's because I have pop-ups and such blocked?)
If you've got another day off before you have to go back to work this short video will inspire you to get some sketching done today!