I'd visit the near future, close enough that someone might want to talk to Larry Niven and can figure out the language; distant enough to get me decent medical techniques and a ticket to the Moon.

I love superconductors.

We should not have assumed that a political space station could be built.

In hindsight it may even seem inevitable that a socialist society will starve when it runs out of capitalists.

Everything starts as somebody's daydream.

We're looking as far ahead as we can, and we don't get penalized for mistakes.