Well, maybe not starve yourself for the entire flight, but certainly sleep for as much of the flight as possible.

If you're flying from Switzerland to Australia, there's usually a stopover, so I will often eat once I'm off the plane and in the airport.

I'm not a fan of plane food so I like to eat beforehand, but I might have a snack or two on the plane before I doze off.

The last few times I flew to Australia, I slept right through, and it feels better to arrive hungry than to spend a whole week feeling jet-lagged. The flights I take tend to arrive in the early morning in Australia anyway, so it's good excuse to go straight from the airport to a nice café for breakfast.

The last time I had jet lag, it lasted over a week (pretty much the whole time I was in Australia), which didn't make my time there too enjoyable (was in bed by 9pm most nights).