Coffee

Coffee or roasted coffee beans brewed in hot water, is the most popular drink that probably competes only with tea in the non-alocholic beverages category. Coffee being a rich source of caffeine it can help the human body overcome fatigue and improve physical performance and also lower risks of several conditions like Type II Diabetes, Cancer and Alzheimer's and Parkinson's disease.
Coffee liqueur is a popular and brands like Kahlua and Tia Maria are regulars in cocktails, but often brewed non alcoholic coffee is used in cocktails too, hot black coffee with Rum and whipped cream is what makes a Troical Coffee Cocktail for you, and being a caffeine rich liquid, it is a strange combination with alcohol since it tends to interact with the body and do just the opposite of what alcohol does, that it, tries to keep you alert and awake.

Vodka

Vodka is an European clear distilled alcoholic drink that has been one of the most popular drinks across the world .

You'll find it to be the most popular spirit in drink making because of it's neutral taste and absence of flavour and colour.

Vodka often replaces Gin in many traditional cocktails

Vodka is known to be good for the heart, and if consumed in moderation, can prove to be good for cardiovascular health

Note that these days there are flavoured Vodka available in the market too, and some cocktails do make use of them.

Sugar

Brown Sugar is a sucrose sugar with a distinctive brown colour from the presence of molasses, it is a partially refined or unrefined sugar containing sugar crystals and residual molasses giving it a distinctive taste and flavour of crystallised molasses or toffee. The taste of dark brown sugar is described as a caramel taste with a deep molasses flavour.
Brown sugar is used in cocktails where a caramel candy or toffee flavour is expected.

Caster Sugar is finely ground granulated sugar. It is not as fine a powdered confectioners' sugar and has a little grit to it. It is somewhere between confectioners' sugar and granulated sugar, and melts in mouth with a mild spicy feel to the tongue

Vanilla Sugar is the regular granulated sugar infused with vanilla flavour, by using vanilla pods and seeds to flavour the sugar. A home made alternative is to use vanilla sticks or pods in a jar of sugar and leave it sealed for 4 weeks to allow the vanilla flavour to infuse. Or to use granulated sugar and vanilla extract and blend in a mixer, although this ends up in powdered sugar.