I did my favourite technique - something I'm comfortable with, something I know very well. I started painting in the afternoon, because I knew I wouldn't be able to finish it all in the 60 minutes of my stream. I drew the outlines, gessoed the page, prepared paints - and waited for my time slot. Despite all the preparation, the colouring still took longer than I'd expected... But I managed to add the finishing touches to the page after my stream, just before midnight:
So, with the last of the 54 pages (52 pages for each week of the year plus one introductory and one final page) finished in the last minutes of 2012, I can call this mission accomplished...
Note on the technique:
Here is a little tutorial for the technique I was using for my New Year's Eve page. There are more examples on my Flickr.