Old person here (+7 decades). Not much you can do about physical deterioration. The only thing I've found you can easily carry into old age is (assuming no senility or debilitating disease) coordination. One can be weak and frail yet still somewhat graceful. As for the mind, it depends on when it freezes in time. If you find yourself comparing everything current to the "good old days", then you are probably lost. But as long as you have an appetite for the new and unfamiliar (maybe something like ycombinator) then there is possibly still hope...