train vigorously, build up your stamina, sweat everyday, imagine
a war is coming
eat lesser and simpler (veg, fruits, plain rice)
everyday
don't go out and spend unneccessarily
don't use aircon
don't use the lift, use the staircase instead
don't take MRT/bus, walk instead
try to do menial stuffs
just imagine how your ancestor slogged out their lives in the
1940-1950s, braved hardships, poverty, starvation
if you have been through national service especially bmt, think
of the hardship days and try to emulate such lifestyle again
try to adopt a laid-back lifestyle as what our ancestors have
gone through..instead of modern lifestyle that many out there are
doing
if you are able to achieve all these, i can assure you you will
be able to live in good health beyond 90 years old without any
major illness, pain and you will still be very fit by
then