Depends on how festive a party you are throwing....
In any case, I recommend NOT mixing too many alchohols at once. At the very least you get heartburn the next morning. With that warning in place...
Do you want Girlie Shots? Manly Drinks? Or somethig for everyone?
Girlie Drinks include:
Jaeger Bombs (aka Bull Blasters)
Amereto Sours
Pucker Shots
Jolly Ranchers
Grasshopper/Girl Scout Cookie
Sex with an Alligator/Alligator Bite (or sometimes the word crocodile is used here)
Alabama Slama's
Manly Drinks: Usually straight up or with a chaser...
Vodka
Whiskey
Gin
Tequila
Rum
Cyclone (love this one as it's tequila and rum mixed already)
Everclear
151
Or drinks for everyone that even the manliest of men won't complain and girls don't usually think they are gross:
Beer
Long Island Ice Teas
Lunchboxes (I LOVE lunchboxes and so many people will outright think it's disgusting hearing what is in it but love the taste when they drink them)
Regular mixed drinks like crown and coke, just mix in the proper proportion for whomever is haivng the drink to their taste.
White Russians
Bulldogs
Martini's (there are girlie martini's like cosmopolitans, and manly ones with lotsa vermouth)
Margarita's
However... you can't go wrong with always having Beer and Smirnoff Ice in the ice chest. Some girls like beer instead of the Smirnoff and some guys (the wierd ones I know) prefer the Smirnoff. Works wonderfully well at just about any back yard party with random guests.