Kudos Akshad and Mr. Greenfield, Wonderful advice; I would like to add another dimension: Supplements. I am a retired physician who at 74 seeks a long "healthspan". The paradigm-shifting book, "Lifespan" by Harvard aging guru, David Sinclair, advises all of the smart techniques that Mr. Greenfield uses plus three supplements that raise the level of a esoteric class of chemicals - sirtuins that allow, in animal models, DNA misinformation to be corrected. The supplements are Resveratrol, Nicotinamide Mononucleotide (NMN) and berberine that functions similar to metformin, the only drug shown to increase lifespan in humans. As noted, this is not a take 3 pills and eat candy all day slothful in your chair program. It is a full bore boogie program that includes ALL of Ben's precepts. In eight months it has transformed my life. I feel rejuvenated. Thank you, Peter