What do you do at the tables?

[SammyG-SD]

So I have been playing live games fairly regularly, and my poker buddy is always amazed that I don't listen to music (IPOD/MP3 player), while I am playing. I also don't wear sunglasses and will use a standard table chip as my card protector. My chips are evenly stacked in 20. I will try to constantly drink water, and take frequent bathroom breaks once I am pass the CO. (once an hour)
What are your habits at the table?
Any good advice on what you should do during a long session?
Sunglasses?
Ipod?
Eating?
Drinking?
Card Protector?
Chop every time, or sometimes play for bad-beat?
Chit-chat?