I'm not sure. Part of me would want to go back to follow Jesus and see exactly what he was teaching, since his message has gotten so distorted over the centuries. I think that Jesus was teaching about manifestation and all the other things that more and more people are becoming aware of these days. But the thought of living in squalor with no indoor plumbing or running water or hygiene is a real turn off.
Another part of me would go back to when I was in high school and I would correct all the mistakes that I have made in my life, and believe me, there are plenty. As a child I remember realizing that I seemed to learn best the hard way. The thought scared me, but to this day I still self sabotage and learn the hard way.