Yes I would go back and do it again. The wisdom of near middle age would serve me well through the teen years and help me position for even greater success. I think I would enjoy that either at the same time period as I went through my teens (the 80s) or now.
Honestly though, being a dad now has me convinced that there is no single tidbit of wisdom that I could pass on to myself at that age that would have served me. You see, the 13 year old me just wouldn't be able to internalize grown-up wisdom easily, and I'm smart enough now to know that imparting wisdom just isn't that easy.