You've got a time machine, and enough juice to travel to the past, deliver one object and return. Where would you go and what would you deliver?

I would go back to the 70's and give myself a note that says "buy IBM stock".

I would go back to 1980 and deliver a dvd. I know that sounds silly. But I would also bring a dvd player and tell the person what this devic was and show them how to use it.

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.

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'd go back to 1770 ... And deliver a book on American History to the Continental Congress

I'd go to the time where I can buy stocks of Apple and Samsung.

All humans have time machines,

it's built into the system.

Dreams take you forward, memory takes you back.

Just be sure that if you go back that you don't take,

anything with you that is dated after the time,

in which you arrive or you will not be able to return.