Hi jose
To go lamma island, take the ferry from the wan chai ferry terminal, costs less than S$2. To go Macau, take the ferry from Shueng Wan Ferry terminal - takes 50mins, costs about less than S$20 - walk down the sheltered walkway along IFC.
In Lamma, you can go for the hiking trail and it will lead you to some nice seafood restaurants at the end of the trail. if you're too lazy, just hit the seafood restaurants along the ferry terminal.
In Macau, there're shuttle buses to the various casinos such as Sands, etc. Otherwise just take a cab downtown where the old ruins, fortress and shopping stretch are..
The air pollution is really bad, I used to be able to see the THICK layer of polluted air from my apt at mid-levels side.. some days the fog and pollution was so bad, we could hardly see the harbour or 50m away... HK good for holiday (shopping & FOOD!), no good for staying long-term...