This morning I surfed down the net to find pencil sketch effect tutorials. There are obviously lots of different techniques to produce this kind of effect into a photo. I followed several tuts, to compare the results and I felt like I needed to find the very quick one, yet it should have great result too. So, I came across this (relatively old) tutorial post at Jeff Flowers's.com. Written by Jeff Flowers himself :). He wrote a smart tutorial which is very easy to follow about "How To Turn A Photo Into A Sketch".
Source Photo: Danny North on Flickr