Experienced investors, what would you do starting out today!?

[Nick Johnson]

My wife works on a college campus. We both graduated in 2010 and have decent jobs, and I'm actively saving money to get into REI part time.

The reason I mentioned the college campus bit is because today while having lunch with her at the university, I asked "if you could go back to school today, what would you major in and what would you do differently?"

I'll pose this as a question to experienced investors. If you were starting today, what would you do differently?