Sometimes, it is not a bad idea to set limitations on yourself and your painting. And usually out of frustration, to say to yourself while looking for a possible scene to paint , " Okay, I will paint the first subject I see on the other side of the first hill or knoll I pass over " may be , at first thought, a daunting limitation to set. The unexpected does get you painting and in so doing, forces you to think about the composition. Can I move this over here, what if I made this larger, how about leaving this out ? And how about the colours ? Things are not quite so, 'ready made' and we are apt to take some freedom or liberties (artistic license) with the subject. I think this is a good thing.
The support for this painting is a gessoed panel with a coat of gray acrylic paint applied to the surface.
My palette was Cobalt Blue, Ultramarine Blue, Alizarin, Cadmium Red M., Cadmium Yellow M., Lemon Yellow, Veridian and Titanium White. I did not add any of my other favourites to my palette this time. Again, little medium was used until it was time to do the fun part of adding details near the end. By adding more medium to the paint at this point, it allows the fresh paint to adhere to the surface of the previous layers of thicker paint without disturbing them.
This is just one way of forcing yourself to plein air paint and I am sure you will think of many others.