I would go back to when I was about 23 and hand myself a copy of my marriage license. It would let me know the cheating jerk I was with wasn't the one I end up and would leave earlier and save myself some heartache.
I would return and deliver a rather lengthy note to myself listing the mistakes we made and which ones to correct and which one were beneficial. As well as a list of properties and lottery numbers.
Well you drive on one and you fly in the other.:)
If you are talking about traveling across the US, say from Washington, DC to LA about 3.75 days of travel.