Fill your highball glass full of ice
Take your jigger and your whiskey and measure 2 oz of whiskey. Then, pour it into your glass with your ice.
Take your jigger and your soda water and measure 4 oz of soda water. Then, pour it into your glass with your ice and whiskey.note: you don't have to be exact with the soda water, in fact you can just top the glass off with it instead of measuring if you wish. Take your bar spoon and stir everything together.
Optional garnish: lemon or lime wedge.Cut a lemon or lime into slices.Take one slice and cut a notch into the pulp. Then, place it on the rim of the glass.