Swirl your wine. This releases molecules in the wine allowing you to smell the aroma, also called the bouquet or nose. After you smell the wine, sit back and contemplate the aroma. Don't try to "taste" the wine yet, concentrate only on what you smell.
It may be difficult to describe in words when you're a novice, but after trying many wines you will notice similarities and differences. Sometimes a certain smell will be very strong with underlying hints of other smells. Take your time. By labelling an aroma you will probably remember it better.
Next, well we finally get to taste the wine.
"Man has six organs to serve him and he is master only of three. He cannot control his eye, ear or nose, but he can his mouth, hand and foot."