Ask, how can radial lines make a scene stand out?
Ask, what lines bring balance or depth to a scene?
Ask, how can objects be arranged in foreground, middle ground, and background to bring balance?
Ask, what horizontal symmetry may look interesting?
Ask, what vertical symmetry may look interesting?
Ask, how can different colors and color palettes bring balance?
Ask, how much saturation and contrast do I need? Study complementary colors, as well as color palettes (web designers are familiar with this)
Ask, how can lights and shadows make a scene more vibrant?
Ask, how can backlight make a scene more interesting?
Ask, is color needed? Look at shapes and patterns.
Ask, how much contrast do I need for monochrome images?
Ask, what size should the subject be in a scene?
Ask, how is the compression of a long lens perceived?
Ask, how can reflections bring balance to a scene?
Ask, what is a better fit, high vantage point, eye level, or low? Ask, what would it look like straight up, down, or another weird angle?
Choosing a frame for your composition and ensuring the photo foreground and background complement each other