I am using the Worldbuilding site as an example. As of now, there is no way to easily get from the main site to meta (or back). To get there, you either have to change the URL in your browser or click one of the items in the Hot Meta Posts section and from there click the header to get to the main menu.
Here is where I am proposing a change:
The word meta could be linked to the meta for that site. This seems like a simple, intuitive change. Sure, it's small, but it would save everyone time without hurting the experience of new users who can easily get confused by complicated menus that lead in circles.
The picture here didn't look right, so after a little more playing around with it, I got these. Take your pick.