go to both jocky clubs, it is fun to bet like ten hk dollars and watch the people scream and go crazy
Try out all the special dishes that they don't have in your area restaurants. It should be real fresh also.
Other than eating, I usually shop till I drop -^_^ I went back with half a suitcase of clothes and stuff and came home with 2 and a half -sweat ..... thank god I went home with my family and made them give me all the space they don't need -tongue2 .. its just such a bargain to resist. I had shoes, dvds, cd's, clothes, you should check stuff out too.
go to lama island and see the big buddha. eat lots of dimsum, bbq pork and roasted goose. there's a area that's filled with bars if you like drinking and just hanging out. take the ferry to macau for the day, it's pretty cool there.