I saw this photo of a magnolia blossom on Witty Title Here and couldn't resist playing with it.
the original photo
my edited version
First I adjusted the Exposure. Then I added a new layer, filled it with 50% gray, set the Blend mode to Overlay, then used the Dodge and Burn tools on it to bring out the highlights and shadows. Finaly, I adjusted the Color Balance to give the photo a warmer tone.