If your crippling ennui is such that you cant even decide between a Seven-Layer Burrito and a Quad Stacker, Eating the Road has an amusing flowchart that should help you navigate the bevy of fast-food options. It's based on queries like Are you drunk? and Are you drunk on malt liquor? Kudos to the site for reminding chicken cravers that Chick-fil-A is closed on Sundays. Classic rookie mistake.
Where Should I Eat? Fast Food Edition (Flowchart) [Eating the Road]