11. Fake museums
... like the Amsterdam Tulip Museum, Hash Marihuana & Hemp Museum, Sex Museum, Erotic Museum, Museum of Prostitution, Cheese Museum, and Vodka Museum. Be warned that these are not museums but in fact just shops where you pay entrance fee for.
Go rather to real museums like the Rijksmuseum, Amsterdam Museum or Rembrandt House. And go in the morning between 9:00 to 11:00 to avoid long queues! And... you still want something with vodka? Go for a real cocktail at one of the popular hotel bars in Amsterdam.