Well, hindsight is 20/20 and I try not to hold on to too much regret, it can really rob you of what you have, but.....
1. If I had known then what I know now, I would NOT have gone into education. I would have studied something different.
2. I would have been more careful with my health and weight and not allowed myself to need to work so hard to get it all back.
3. I would NEVER have taken out 2 years from my retirement account (stupid, stupid, stupid!)