This effect is quick and very easy. It started life as a colour photo and within 5 minutes or so using Photoshop’s filters it became this bluey, almost inky, line drawing. You can spend longer to get every detail just-so – I have another tutorial on here for creating a watercolour effect painting – use that as the basis for stripping out the details of your picture first if you have time to spend longer on your image.
Anyway, this was done in 5 minutes. I have my original notes written around one of my old doodlings pdf’d for you to download.