Thanks for the ideas! I don't know about the water, I usually do not feel thirsty when I am away for a short distance. I always wave to those I live with in the group home, but don't really know the other neighbors..
smiling would only be an option if they look friendly and not sour, and I am in the mood for it of course.
I haven't had a portable music device since the tape ages, I will have to think about this one, maybe buy an iPod or something like it.. I don't want to look awkward, but the music might help me...