At what age did you figure out what you wanted to do for a living? And how did you do that?

I was about 23 or 24. I was working in a machine shop and decided I did not want to spend the rest of my life covered in cutting oil. I sat down and thought about things I was qualified to do, things that I thought were important, and things that I thought I was good at. I narrowed it down to an occupation that I was interested in....prepared myself. Then I went about applying for the position. Was hired at 26 and it worked out well for me.