Studies show that loneliness can shave eight years off your life expectancy. That may not move you but conquering social isolation is one of the tools of lifestyle changes that can keep you feeling better, more confident about yourself, and help to stave off illness.
Having a sense of purpose may seem like an esoteric option, but people who have a goal, a desire, or a purpose more-than-making-money also get better sleep and go to the doctor less. Plus, optimism about your age no matter where that may be, with an upbeat view, means you are more likely to recover from a severe disability and seek out better preventive health services.
If you can, be publicly minded. Thucydides, an Athenian historian and general whose History of the Peloponnesian War recounts the fifth-century BC war between Sparta and Athens had no use for men who refused to participate in public affairs—at that time they called people like that “Idiotes" (ΙΔΙΩΤΕΣ). Thucydides wrote: “The man who took no interest in the affairs of state was not a man who minded his own business, but a man who had no business being in Athens at all."