What would you do if you knew the future?
mattlarge: I think Zepolen is correct, so much comes down to timing. If you look at a lot of the "successes" that you would want to get there before they were reaching slightly beyond current tech/social environment. For example, Flickr/YouTube were predicated on the fact that storage costs were crashing and end user bandwidth was drastically increasing. You couldn't have created them much earlier.Wikipedia was timed for the explosion of users on the internet allowing for massive crowd sourcing, again you couldn't have gotten there much earlier.The best way to leverage knowledge like that would be to go back and become the world's most prescient VC. Also avoiding the bubble bursting and the current crash would be great.I like the idea of going back and getting myself into a position to work on some of these projects though. being able to be there when they happened would be cool