Many frequent flyers stand by the fact that if you keep yourself hydrated and get plenty of rest the effects of jet lag should go within a few days. However, there are some other ways to stop Jet Lags effects and there are remedies to stop you getting it all together.
Wellington to Sydney jet lag information
Lets assume you left Wellington at 9:00am. The flight takes approximately 3 hours 27 minutes so you would arrive in Sydney at 9:12am Wellington time which is in fact 7:12am Sydney time.
Your body will be telling you that its 9:12am but actually its now 7:12am