This is the pic he's talking about.
As mentioned, a flash was used. When I'm shooting an individual subject, I try to remove all other things that may distract from what I want to see. What may not be noticed in mine is there's actually four flowers in the pic. None are centered. Only one is almost a full flower. What I was thinking of was the textures and edges of the petals.
Take an object, set it on a table and look at it. Walk around it. Get lower, get higher. Really give it a good once over. Then pick up your camera and take a few shots. Post them so we can see them.