The idea of this question is to start to focus on proactive things that we, as a community, can do to get the site more polished and ready for the official launch this is hopefully coming. Many of these are tasks that will continue beyond the beta period, but it seems like it would be good to get into as good a shape as possible before then.
Update the FAQ At the moment, we have a fairly generic welcome page that details the basics of how to use an SE site. Should we have details on issues more specific to economics.SE (such as our policy on homework questions -- see below)? Is it a good idea to have a one-stop FAQ page, or should we have one general "how to use the SE" FAQ and another one dealing with the question of what is on topic at econ.SE? We should also think about common reasons why people's questions/answers get put on hold or down-voted and try to provide some guidance on resolving this.
Agree official guidelines on homework questions This issue comes up again and again (see, for example, here, here, here). My impression is that we have converged on something like a consensus around the approach that homework questions are allowed but must show effort and must not be too specific so as to be of no interest to future visitors. But if this is really the consensus then perhaps we should codify it somewhere.
Think about whether there are other areas where guidelines are needed One facet of this was briefly discussed here. But are there common problems people see coming up, and is there a useful way that we can construct a policy for dealing with them?
Update the comment templates Here are some template comments that can be used in response to questions that need improvement. But it would be better if they all pointed to some appropriate page (such as the FAQ) where people can find information about why their question is being put on hold/down voted and what they can do about it.
Compile a community wiki listing common newbie questions I'm not sure whether we have enough material to do this yet, but it might be a good idea to start to put together canonical questions (much as FooBar has started to do) that are likely to speak to a lot of newcomer's queries. Having identified such questions, we could (a) put a lot of effort into getting some really high-quality answers posted and up-voted, and (b) compile a list of where to find these basic questions and their answers.
Agree what the Econ.SE should look like Once SE sites get out of beta, they get a proper customised site design that reflects the subject matter of the site. What should the econ.SE site/logo look like? This was briefly discussed here, but the discussion didn't go very far.
Continue the work of organising our tags Including merging duplicates (and voting on proposals to do so), and deleting redundant tags. Also, if you visit our tag page you will see that each tag has a tag wiki with details on what the tag means and when it should be used. It would be great if the community could see that most of our tags have a wiki. Here are some guidelines on wiki authoring.
I am making this post into a community wiki. My suggestion is that anyone who has a task to contribute to the above list goes ahead and adds it into this post. "Answers" below can be used for suggestions on how any of the above issues should be handled (or why they should not be handled!)