Great post Evan! All I would add to the basic getting started list is this:

Finding Waves to Wave in –> In the search bar, type in the following: “with:public” (without the quotes). To further focus your search, follow that up with a search term, such as: “with:public tech” or “with:public gaming” (again, without the quotes) .

This should help people have something to do once they get in. Just bear in mind that heavily populated waves can be a bit slow and clunky. :)