If you had a second chance?

Following on from the Ology thread, if you had your time over, what would you do instead?
I wonder how many of us made the right choice at 16, 18, 21 or even 50?

With hindsight - such clear vision! - I definitely did not make the right choice at 18. I was horse crazy since the age of two if my mother is to be believed, so when I left school after A levels I trained to be a riding instructor. Then I worked on a pony stud till middle age, when I realized if I didn't change my job I would always be poor - and I mean poor! There is no money in most equine careers. So I spent the next 18 years packing pork pies, which I hated, but which had lots of overtime to build up my funds, until I gave that up to care for my Mum full time.

Mild autism had a lot to do with my choices, as I don't relate well to people. But if I could have my time again I would go to University. What would I choose to study? There's so much now, not so much back then, so maybe geography or geology, or archaeology, or horticulture - something that would give me an outdoor career.