I'm going to europe this summer (Brussels, Amsterdam, Munich, Prague) and i heard that pickpockets are a bit of a problem, especially in prague. Since i'm going to be taking a lot of night trains and might end up sleeping in some train stations/airports (not alone of course), i was wondering: How do you stop yourself getting robbed in europe?

Is there anything you can do to stop people robbing things like your passport, train tickets, interraill tickets etc...? Is it safe to leave your bags in hostels and where can you leave your valuables when you are going out on the town???

Are there any precautions you can take to ward off thieves? (fake wallets etc...)??