I started [doing X] when I was [Y years old].

Since then, I've...

If I had to do it all over again, here are 5 things I'd do differently.

Thing #1: Don't do X.

At the time, I thought [this] was a good idea.

It wasn't.

It led to [problem 1], [problem 2], [problem 3].

Instead, I would do Y.

Thing #2: Do X instead of Y.

I really thought X was going to give me [the result].

It didn't.

Instead, I would do Y. Because I learned much later that Y...

Thing #3: Do X, first.