If you could go back in time quit groaning! what one thing could you change that wouldn't substantially change the course of your life?

I simply can’t answer those “if you could go back in time” questions because too much of what I cherish, my kids and grand kids, probably wouldn’t be born.

However, I quit smoking in 1984 and picked it back up in 1990, after all the kids had done been born. :( If I never started smoking again I think it would change me for the better, and I think my life course would still give me my grandkids. But…on the other hand….the butterfly effect….