There are a huge variety of different topics in economics, many open ended and divided. I think it'd be great if we could have some sort of wiki with a literature review of recommended papers (to read for undergraduates, laymen, researchers, et cetera). Just divide it up into topics like equilibrium, business cycle theory, rationality, game theory, et cetera.
It'd be nice to give such a wiki as a resource so people could potentially refer to the literature review instead of asking vague or general questions.