vodka
sugar
lemon juice

Pour vodka into an ice-filled glass until 80% full. Using a spoon, drop sugar on top until it forms a large peak on top of the ice. Pour in lemon juice until the glass is about 90-95% full, and using your spoon, stir the mixture for about 30 seconds (or until the ingredients are perfectly mixed).

Note: Exact measurements are not used due to the fact that certain people prefer different amounts of sugar and lemon juice.