I don’t want to live to 100. Perhaps, I will change my mind as I grow older. I’m mostly unafraid of dying. I fear for those I leave behind. I partly attribute this to confronting the death of my father, and of my best friend while still studying. This is useful as I likely eat too much to be able to live to 100.

However, anti-ageing an interesting line of research and Laura Deming (who runs a VC fund looking at longevity) has a summary of the major lines of research.

I also find the studies of these old Okinawans intriguing (perhaps they are calorie restricted;,  The Okinawans have traditionally kept eating a low-calorie, low glycemic load diet, practicing calorie control in a cultural habit known as hara hachi bu - only eating until they are 80% full). Although it seems the >100 years old population in Japan has peaked.   

There is another pocket of super old in Sardinia, Italy.  The Sardinian pocket is known for male 100+.  (And a researcher postulates that laughter and walking help the Sardinian men ""Sardinian men are famous for gathering in the streets for a laugh every afternoon, something proven to relieve stress - the term "sardonic" originates in Sardinia.") A photo story on Sardinia.

Scroll below for a Ted talk on ageing, below are the sub-headings from Deming's work. 

From Deming:    Major areas of ageing research

• Caloric Restriction   (eat less)

• Insulin/IGF  (Insulin pathway, use anti-diabetic drugs)

• Parabiosis (replacement using young blood)

• Senescence  (removal of old cells)

• Autophagy  (remove old cell parts better)

• Hypothalamus  (growth hormone and hormone pathways)

• Reproductive System (removal of gonads, cf Korean Eunuchs)

• Mitochondria  (mutations in mitochondria)

• Sirtuins  (alters DNA)

Link to Ted talk here.   And transcript here