As I'm buliding my bike for an extended stay in Europe, I'm growing more and more concerned about it being stolen. I've built a fairly nice cyclocross/light touring bike which is sure to be a target for any bike thief. I've got a new Kryptonite U-lock and am even considering bringing a wire cable, in spite of the weight. I'm going to keep it indoors as much as possible and walk rather than take the bike for short trips around town. Still, I know that one mistake on my part and it's gone. Also, I'll be staying in hostels and B&Bs, so even indoors it's not very secure. Could any of you experienced tourers share some tips or allay my fears?