If you have a look through your photo album you may be able to find (just like I did) a rather ordinary looking photograph of a landscape.
So you have your reference photograph now all you need to do is set up your paints and all the other paraphernalia (apart from pencils and eraser) that you use in your painting process.
I used a photograph that was black and white and represented a scene in a large park. I used the basic shapes of that photograph but as I worked I imagined a park full of bright flowers, complementary colours, differing shapes and movement. But I also used two particular watercolour techniques: wet on wet and glazing. I also used a wide variety of brushstrokes. Just imagine … that is all you need to do!