Get Closer and Fill the Frame
One of the most common problems in beginners' pictures is a small subject lost in a big, busy scene. Decide what the picture is of, then walk towards it until it fills most of the frame. Use your feet before the zoom: on a phone, pinching beyond its built-in lenses only crops and enlarges the picture, so detail drops away.
Exercise: pick one subject, such as a bicycle, a doorway or a friend, and take five pictures, each a step closer than the last. Your favourite will often be a step or two nearer than where you would normally have stopped.
