Originally Posted by Traveling Man
And speaking of baggage, beware of pickpockets and baggage thieves at the airport, and if you're taking the train (highly recommended) to downtown, also at the stations and onboard, and in the city.
Not to spoil your fun, but staying alert especially goes for AMS, the city and points in between. Have a great time in Amsterdam!
I would say that this advice is valid for most tourist destinations in Europe, not unique to Amsterdam. Great city to visit, even for a few hours.