There are three things to note:

1. The inbound Fast Track requires a special paper invitation which should be given out on the arriving plane. If you do not have it then must line up with everyone else. Look for the special carpetted in the centre of the immigration hall.
2. Outbound at immigration there is again a dedicated channel for premium passengers, again look for the carpeted area. Just need to show premium boarding pass.
3. Outbound the main security check is at each gate, and there is a seperate line each for premium and economy passengers, though sometimes this is not strictly enforced.

APEC card is best!

Merry Christmas to everyone!