There are some basics of cocktail making and ingredients that are essential to know in order to create the perfect drink. Here is some of the terminology.
Most etymologists believe that the word 'cocktail' derives from the word 'coquetel' which is a French wine based drink. Mixed drinks have been around since ancient times and cocktails in some form or another since the sixteenth century. They became fashionable again during the 1920s as bootleg alcohol tasted so foul that it had to be mixed with a variety of other ingredients to make it palatable. Cocktails enjoyed a second wind in the 1970s as people began to 'chill out' and a plethora of new ingredients and spirits from around the world became available.
Today cocktails enjoy a permanent place on the menu in most bars and hotels.
It would take a lot of money and time to have a pantry stocked with every ingredient you could possibly need for every cocktail but there are some added extras which are used in a lot of cocktails that are worth having.
Unless you are planning a cocktail party the most sensible option is to choose two or three cocktails you might like and stock for those. To stay economical try to choose cocktails with the same alcoholic base.
For some great cocktail recipes check out the cocktail section of Suite 101 or try the book The Cocktail Bible by Linda Doeser (publisher :Paragon 2001 ISBN: 0752558811)