I never had a problem with that one. I mean, isn't it obvious that if you say "I literally couldn't get out of bed" you are using the word "literally" to strengthen a figure of speech, namely, hyperbole, or exaggeration for effect? You are just saying that you were really tired. You were so tired that "you couldn't get out of bed." Nobody thinks that you really couldn't get out of bed. Similarly, if you include the word "literally," nobody thinks that now you really mean you actually were physically incapable of getting out of bed; it's just a way of strengthening the rhetorical device by increasing the level of exaggeration. Why should the word "literally" be excluded from all figurative usage? I am a huge stickler for diction (the "irony is not coincidence" one is a big thing for me, for example; it drives me nucking futs when people misuse the word "ironic," and it's all because of that damn song) but I don't get the problem with "I literally couldn't get out of bed."
(descends from soap box)
