Recently, a friend told me he wanted to spend more time using Twitter, but he didn’t quite know how. His primary interest is comedy, he told me, and he hoped to find a way to see comedians’ best jokes on Twitter as they were posted. But when he followed comedians, he mostly saw a lot of self-promotion — tour dates, late-night appearances, and that sort of thing. No matter your personal interests, there are countless good and relevant tweets on Twitter. But where are they?