I liked the idea of a theme day rotation that is pretty regular. I forget who wrote it out, but they suggested "Freestyle Friday," which means post up whatever pictures you want!
Remember that theme days don't mean you can only post of that theme, it's (as whoever it was that came up with a great rotation to follow put it) a way to promote a variety of shooting situations. We want you all to grow and improve as photographers!
So, since it's 'Freestyle Friday,' GO NUTS!