1, the converter is necessary, because the general foreign power jacks and domestic are not the same, but buy is also very convenient, generally in the airport ah train station can be bought, the voltage of other countries I do not know, Italy's voltage is 130V-220V, the domestic appliances can be used, do not need to bring a transformer
2, if you are living in a hostel of a kind of place, things have to bring all the, because there in addition to providing beds, basically on the other, but you want to live in the hotel, you can not bring, there are provided, and can also be to the local and then buy, the convenience store is very convenient, are 24 hours of business.
3, go to Switzerland and Germany is slightly better, if it is to go to France and Italy, especially the big cities such as Paris, Marseille, Milan, Rome, these places are especially many thieves, and recently also specialized in robbing the Chinese, so to go to these places to be always vigilant, especially found in Arabs (mainly Arabs in North Africa, Morocco and other countries), blacks, gypsies, Romanians, and so on. etc., of course, the local white national quality is still generally higher.
4, there is a time to go out and try to partner, do not own activities, do not go to remote and quiet places, do not bring too much cash, less talk, other places I do not know too much, but in Italy, Asian tourists were robbed is a common thing.