Ryu: you sleeping in a dorm? TAKE EARPLUGS WITH YOU!!!!!!!!!!!!!!!!!!!!
They saved me _many_ times when sleeping in hostels. Keeps out the snoring/wheezing/oozing sounds of other people sleeping. Oh and also handy for those noisy garbagetrucks outside :-).
I remember this one night in Melbourne when I didn't have earplugs and 2 ppl were screwing in a very noisy bunkbed 3 meters away from my bed. I came very close to murdering people that night.....