One each day for 10 days
If you look at the work of Henri Cartier-Bresson, he applied geometry to his images poetically. If you look at the composition of his images he integrated vertical, horizontal, and diagonal lines, curves, shadows, triangles, circles, and squares to his advantage. He also paid particular attention to frames as well.
Look for shapes and geometry. Open up your mind and break your environment into different formal elements. Look for lines that may lead to your subjects or squares that may frame your image.