Sub-categories should be blocked together (such as vodka, gin and rum) as it helps shoppers see what a store has to offer more easily. Consider vertical blocking for larger fixtures to make them easier to navigate.
Brand leaders such as Smirnoff and Gordon's are recognisable - place them in the centre of the sub-category to make them stand out.
Shoppers are less likely to make a purchase if they are unsure of the price. Ensure the price of each product is clearly communicated.