The most crucial facets for a long life , I think, are partly in the genes; number 2 is life style, which includes balanced diet and standard exercise. I go, work and swim every day. Nevertheless, I think an excessive amount of workout can also be unhealthy due to over-stress; sometimes those who exercise also much time daily die early.
The good point about’Arrow’is we never say never on the show. Preferably the show could have a great extended life , and all method of points could happen.