Uhm, I've got nothing further to add except enjoy your hot pot and yes, I've heard of the tip of freezing your meat for a bit before slicing. I think I've seen this on the cooking channel.
I would also hot pot all the variety of mushrooms like shitake, etc. They're so yummy in hot pot. And those yakisoba japanese noodles are perfect in hot pot too. Cabbage, bok choy, green beans, spinach, chinese brocolli, etc are excellent.
Enjoy.
)
ADD: Ok, I lied about the "nothing further to add" part. ;P