You've probably already stocked up - but just in case... I keep a supply of ingredients (god I sound like a lush!) in my cupboard that all happily mix with each other - so you can make lots of cocktails with few ingredients. Vodka, gin, cointreau, tequila, fruit juices (lime, lemon, orange, cranberry), and mixers such as lemonade and ginger ale (and champagne or cava, if you fancy!). No matter what combination you mix these in they all taste good! (whereas spirits such as whiskey and brandy can taste revolting if mixed with the wrong combination). Make up your own names - your guests need never know they are improvised! My favourites are Cosmo (cranberry, vodka, lime, cointreau) and margheritas (tequila, cointreau, lemon and lime). Happy partying!