Place my subject on a plain, saturated single-colour background, edge to edge, with no gradient. Relight it with a hard directional source so a crisp, deliberate shadow falls across the background at an angle. Keep the subject's shape, colour and material exactly. Centre it with generous even margins. Clean, graphic, modern — one colour, one shadow, nothing else.
“Use it” opens the editor with this prompt already loaded — add your photo and generate. Copy works anywhere else: ChatGPT, Gemini, Midjourney.
One hard shadow across a flat colour is a whole art direction. It costs nothing and always looks intentional.