Below you will find the wine aroma wheel, which is an integral part of any wine lovers arsenal. Originally developed by Ann C. Noble a sensory chemist at the University of California's Department of Viticulture and Enology (the science, production and study of grapes and wine respectively).
Whilst some may argue that it is now a bit dated and therefore doesn't pick up on some the newer nuances that today's wine drinkers do i.e. guava or papaya it is nevertheless still a very useful tool in starting to understand, describe and trust your nose.
Next time you have a glass, take a sniff try and see if you can pick up on any of the descriptions.