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.
I would put the entire world on ignore and have adventures until I croak, but the awesome thing is, I’m pretty much already doing that and I have many, many years to live.