I always go straight to the nearest supermarket, to find out what the locals actually eat and drink, rather than what the guidebooks say they do. Essential for making informed restaurant decisions later, and a dependable entertainment in itself: there’s always some arresting indigenous twist on a theme, such as lobster-flavoured Walkers crisps, and you can usually count on spotting the likes of Frische Dickmilche or Fockink Anis on the shelves.