Back in my classic asp days, I used to average 12 hour work days with a few 16 hour days as the deadline drew near. No pills, just caffeine, junk food and cigarettes.

I'm sure the way I behaved in my 20's has cost me a decade of my life.

The worst was an 19 hour stretch, but I started getting confused and puking so I slept for 3 hours before finishing and then presenting.

I'm just glad those days are behind me.
I think I'm way more productive and healthy now at just 8 hours a day.