It's common advice to simplify your script, minimize locations and actors, etc. This show takes that to an extreme - it literally takes place entirely within a single booth in a diner, and relies solely on the actors and dialogue to tell a larger story. I've only watched the first season so far, but so far I think they've pulled it off really well. Two seasons are available on Hulu right now:
http://www.hulu.com/the-booth-at-the-end
http://www.hulu.com/the-booth-at-the-end