Studio Calico mask over a piece of cardstock and spritzing with opaque ink.
Copic marker (alcohol based ink), but a Sharpie would work well too. Experiment to see what you like. I did a lot of testing to find the right look for me.
p.s. These are pages from my 2011 December Daily. The "why am I posting them in 2013" can be found in this post. Thanks for stopping by!