Wine Tasting Tip - How to know the perfect drinking point of a wine?

APPEARANCE (how does it look in the glass)

 

White Wines

Whites lose their greenish tint and tuning into a more yellowish golden in appearance.  Keep in mind that if the wine has started to appear brown in color oxidation has taken place. 

 

Red Wines

With the reds, the color changes firstly from a purple to red and then becomes claret, which will finally turn to a brownish tone which indicates oxidation has taken place. (Beyond it's time)