Light and shape
Compare how one subject changes as the light moves. Watch shadow edges and surface detail. This builds a vocabulary you can use in portrait, still-life, or location photography.
Position and framing
Move before editing. A different height or distance changes scale, overlap, and the relationship with the background. Review the frame's edges as carefully as its centre.
Sequence and selection
Keep related frames together and choose the ones that communicate your question. A small sequence can reveal a way of seeing more clearly than an isolated technical exercise.