Renting a car is expensive. If you are not going on a road trip, you should check out public transport or Uber. Hotels sometimes suggest free or cheap transfers to the airport, and many European cities have comfortable express trains that will take you straight to the city center more quickly than a car will.
If you love traveling as much as we do, you probably have your own set of rules about saving money during a trip. But if the first place you look for in the airport is the currency exchange or taxi stand, then you should check our list of the worst mistakes people make when traveling. It will help you to save more money that you can then spend on your next mind-blowing adventure.