When is the last time you actually laughed so hard, you cried? If it's been too long, then I highly suggest the podcasts by Ricky Gervais. For those of you who don't know, Gervais is the genius behind the original British version of "The Office" (as writer, producer, and star and also producer and sometimes-writer of the American version).
I was listening to the podcasts while at work and literally sat at my desk crying. I can't recommend this too highly.
Now stop reading this and go get your laugh on.