Simple Syrup
Simple Syrup (also known as Bar Syrup, Rock Candy Syrup) is little more then a mixture of sugar and water.

You first bring the water to a boil, then dissolve into this the sugar. Once the sugar is fully dissolved, you remove the pan from the heat and allow it to cool. The resultant liquid is easily stored in a plastic squeeze bottle to make it easy to add to cocktails as necessary.

The ratio of sugar to water can be left to personal preference, traditionally it is one part water to two parts sugar.