It's always funny to me, when the idea of cliche or tired subjects bubbles up somewhere. Sand dunes, clouds, flowers, ferns with dew on them, any large leaf with dew on it, ice formations, old, weathered siding, old, weathered hands, etc etc. You have to photograph something in order to get better at it. Maybe the instructor and/or your audience has seen "a million _______ images," but so what.
Oh, to get us on track with the thread title I saw this yesterday;
"The Enthusiast's Guide to Composition" (48 photographic principles you need to know) by Khara Plicanic Rockynook books.
I appolgize for my butchering of punctuation. My text options are deselected. Perhaps I need to ante up again?