Overpacking.....This is a problem with my wife and myself every trip we go on. We never learn! I can't blame my wife because I am just as bad being a metro sexual guy. My tolietries sometimes out weigh hers! Now that we have kids 2yrs and 4 yrs they have to have at least 1 outfit if not 2 per day. Every year when we are packing our stuff to go home we always look and laugh but that's part of each vacation.
Sorry getting off subject here, as far as stuff to buy cheap the only thing we buy before we go is cologne/perfume, maybe some jewelry, and a certain kind of cigars. shhh