1, 3, 4 & 6 are all fairly easy to do.
Already do healthy portions and no waste. We do eat meat but not a lot and we try to buy things like eggs and milk locally.
I've never had a major electrical appliance that DIDN'T last 7 years ? Been in our house 22 years and in that time we've only had 2 hoovers, 2 ovens, 2 washers, 2 TVs and 1 tumble dryer.
In the 41 years of my life I've only flown long haul 3 times and short haul 5 times.
We've done things like reusable nappies for DS when he was a baby, reusable Sanpro, walk or cycle for short journeys, house is well insulated, glass milk bottles, paper or reusable shopping bags etc etc
2 & 6 would be the hardest for us and mainly that's due to our hobbies!
I try to buy anything that I would only wear once (eg an outfit for a wedding) second hand. Same with bits of DS uniform. But I do triathlon and go through quite a few pairs of running shoes and clothing - I couldn't buy these second hand.
Ditto my van. I need it for putting my bike and all my kit in to get to events. DS also mountain bikes, so again I need the van to transport him and his bike to and from venues.
One of the reasons I do rarely fly (over half the occasions I have flown were for work) is that we holiday in the UK. We camp. I couldn't do that without a vehicle.
I don't actually think it's possible to completely 100% do all 6 of those things and still have som enjoyment from life.
I think there has to be a sensible balance.