Assume that you only have the resources and money that you’ve acquired up to this point in your life, and you still have to pay rent, bills etc. You are basically physically capable of everyday activities but extreme feats (eg running marathons, climbing everest) are not realistic.
write a will
settle debts
quit my job to spend more time with my kids
write my memoirs
record hours of video of me telling stories for my kids to have after I’m gone
write down all my accounts passwords for my wife
prepay for twenty years of webhosting and domain registration
plan my own funeral
dance every weekend (though at my currently level of fitness, maybe this would be a feat)
definitely spend a lot more time in church