With the addition of aperitifs, digestifs, and champagne, as well as some choice mixers, garnishes, and glasses, you can cater to slightly more sophisticated palates.

Liquor

Brandy
Single-malt scotch

Also Add

Champagne
Sherry
Port
Cognac
Aperitifs (Campari, Lillet, and Dubonnet, for example)

Mixers

Grapefruit juice
Rose's Lime Juice
7 Up
Diet cola
Grenadine
Sugar and sugar cubes

Garnishes

Oranges
Pearl onions

Gadget

Hawthorne strainer (this coiled-edge tool strains more quickly than a standard shaker's built-in strainer does)

Glasses

Rocks glasses (also known as old-fashioned glasses)

Brandy snifters. (Err on the side of small. Huge, balloonlike snifters are best left for Grandma's matchbook collection or the piano man's tips.)

White-wine glasses

Sherry/port glasses (or you can pour port and aperitifs into white-wine glasses)

Champagne flutes

Pilsner glasses for beer

Cocktails You Can Make

Champagne cocktail: 4 ounces champagne, 1 sugar cube, few dashes Angostura bitters, lemon twist.

Gibson: a martini with a pearl onion.

Gimlet: 2 ounces gin or vodka, 1/4 ounce Rose's Lime juice, lime twist.

Mimosa: champagne, 2 ounces orange juice, orange slice.

Negroni: 2 ounces gin, 1 ounce Campari, 1 ounce sweet vermouth, orange slice.

Salty dog: 2 ounces vodka, 4 ounces grapefruit juice, lime wedge, sugar and salt for rim of glass.

Seabreeze: 1 1/2 ounces vodka, 1 ounce grapefruit juice, 4 ounces cranberry juice.

Sidecar: 1 ounce brandy, juice of 1/2 lemon, 1/2 ounce Cointreau.

Tequila sunrise: 1 1/2 ounces tequila, 3/4 ounce Grenadine, 4 ounces orange juice.