Begin with a watercolour background. (I've used my favourite smooshed distress inks applied with an acrylic block - see the last post).
Stamp on some images with blank ink. I arranged them on a single block and stamped them all at one time so I could do a test run first. Next just colour in a section or two of the stamps with white gel pen and add a few lines and a little dotted border here and there. No skill needed for quite an effective result. This is one example which looks better in reality, and is fine as a sample. I'll definitely be giving it a go a little more carefully (to get the dots more evenly sized and placed, and the straight lines straight etc) in the future.