One thing I do (well, a SET, really... and yes, I made an Action for it because I do it to ALL my product photography) to bring out shadow and highlight details is apply a Shadow/Highlight adjustment, dupe the layer, desaturate 50%, change the mode to Soft Light, then bring up Levels and clip the blacks and whites to taste.

You've just brought out or made more prominent a whole lot of shadow and highlight details and made it punchier without it becoming gawdy and cartoonish.

-Lew