I liked Joe Carlsmith's Orienting toward the long-term future. More generally, the website longtermism.com, which launched recently, is a great introduction to the topic, and includes a 'resources' section which you can check for additional writings/media.

I really like Ajeya Cotra’s Intro EA talk (https://youtu.be/48VAQtGmfWY) (35 mins 1x speed). I also like this article on longtermism (https://80000hours.org/articles/future-generations/) although it took me about 25 mins to read. This is a really important question, I’m glad you’re asking it, and I would really like to see more empirical work on it rather than simply “I like this article” or “a few people I talked to like this video” which seems to be the current state. I’m considering spending the second semester of my undergrad thesis on trying to figure out the best ways to introduce longtermism.

Also worth considering MacAskill’s video What we Owe the Future (https://youtu.be/vCpFsvYI-7Y) 40 mins at 1x speed.

As an example, I currently think All Possible Views About Humanity's Future are Wild would be on my list because it is a) thought-provoking and b) short; only takes 10-15 mins to read.

In contrast, The Case for Strong Longtermism is thought-provoking but would likely take >1hr to read, so I probably wouldn't include it on my list. (Though I would certainly recommend it to people who want to learn more.)