I usually just smile when I'm passing by someone I know (I'm too lazy to wave my hand, especially when they're in my pockets...
![biggrin](emoticons/beigebiggrin.gif)
) If they can't see me smiling widely, I'm forced to use my hand to wave.
But most of the time, I just say "Hey," or "Hi/Hello."
For the elderly, it's the hand to the forehead, but I haven't done it in a long time.
For my siblings, I just say "Hoy," or "Yo" (not yo as in row, but yō, as in shōjo).
And for my really really close friends, I don't greet them but say something rude instead, since they know I'm just joking
![bigrazz](emoticons/beigebigrazz.gif)
(but I only do it sometimes, though)
When I meet someone, I just say "Hello," but if it's a formal meeting, I simply shake hands.
Oh, and sometimes I hug them (well, mainly because they initiate it by holding out their arms or something)
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