Eliezer Yudkowsky has written many posts on Fun Theory. This my sound silly but it's the very serious response to people who supposedly don't want to live very long because they're worried they'll get bored (I've experienced this several times, like here. I think this is a little cringe worthy and I don't claim it's worth watching, it's 7 minutes long).
Here's a relatively long post summarising everything, it's really worth a read. Increasingly, I think a reading Eliezer's posts closely would be a much better education than all of high school put together (not including all the social stuff).