Jokes. Common sense (and evolutionary psychology) show that people like funny people.
How many people are always trying to remember a joke they heard? This seems like an easy solution.
Where do you get your jokes? I thought of this myself, but I only have a few, and I'm not sure where to find more.
Spaced repetition is a powerful learning tactic, and Anki is a good tool for it. There are some LW-relevant Anki decks here. But I wish there were more.
Which sets of knowledge are (1) likely useful to LWers, and (2) straightforward to encode into Anki decks without needing to be familiar with that field?
Some examples:
Which other sets of knowledge would you like to see Ankified? Please link to the actual knowledge set you'd like to see encoded.