Tasting is a process. It takes some practice but it’s really pretty easy. There are two things people often do that prevents the flavors from coming through.
Taste, don’t eat.

Don’t just eat the chocolate or drink the wine. Start by opening up your senses. Smell the wine. Think about what you a smelling. Smell the chocolate. [...]

When you sample the follow these guidelines:

Smell the wine first
Smell the chocolate
Bite a small piece of chocolate and let it melt in your mouth
Sip a little wine
Experience the [...]