I'm only 47. I tipped the scales in my favor at age 32. Before that, it was 16 hour work days, and being there whenever they called. I thought I was living to work, then realized that I was working to live. My only regret is that I didn't figure it out sooner.
I decided that I wanted a life more than a job. I took the mindset that I was more valueable to them than they were to me. I quit my job at 32 years old, and have worked for three other companies since. Each time I found that I am still more valuable to them. Never been fired or laid off. I moved on to create a better life for me and my family. The last thing I want to do when I get older is to look back and say "Woulda Coulda Shoulda".