Money management, finances, investments, etc. - All from a very early age, age dependant, i.e. talked about mortgages, pensions, scams, etc when he was mid teens, but talked about saving pocket money, saving birthday monies, etc to save up for bigger things from a very young age, maybe as young as 4 or 5.
Internet safety from as soon as he started doing online gaming or social media - maybe aged 8 or 9, awareness of watching for scams, not giving credit card details out, not "talking" online to people he doesn't know in real life, if anything's too good to be true, it is too good to be true (i.e. "free" downloads etc).
From around 10/11, Computer usage, apps inc excel, word and databases, how algorithms work with Google searches etc., basic app/website design (loads of free resources), simple programming, etc. They don't teach all this in schools, so someone has to as it's so important for future jobs and living etc.
Basic household tasks, again age dependent, from tidying up from a very early age, through to helping with cooking/cleaning/washing up/hanging out laundry from maybe 10 years old. Mowing the lawn and garden care from mid teens. Basic DIY, changing a fuse, wiring a plug, changing light bulbs and fittings, basic decorating (sanding, undercoating, top coating etc), changing washers in taps, finding and turning off supplies such as water, electric and gas.
Personal care again from a young age, i.e. importance of cleaning teeth at least twice per day, daily showers, anti-perspirant, fresh clothes daily, not eating sweets or drinking sugary drinks between meals, etc. Again, age dependant, discussing sexual health etc from early teens, along with anti smoking, anti drugs, alcohol awareness, etc.
Road safety from a very early age, green cross code from aged around 3/4, understanding traffic lights, looking both ways even on one way streets, awareness of cycles on pavements, etc. Taught him to cycle from around the same age, wearing a helmet wasn't optional, nor were seat belts in cars, etc. That moved onto watching how to drive when a passenger, watching gear changing, observing road signs, etc - which made the transition to driving lessons much easier!
Start early and "drip feed" the life skills from aged 4/5 until they leave home!
Most of it can be done as part of "normal" home life, just letting the child watch and help with the parent does things around the house, or as normal routine, i.e. putting on seat belts or cleaning teeth automatically just by repetition.