Right now I'm reading Oedipus Rex and tomorrow is The Metamorphosis. Both of these were required reading in my college world literature course. Both can be read in one day. Neither of them is as easy reading as an article in People Magazine say.
The neat thing about reading the classics is that it can help you to look at your own writing in a new light. If you run out of things to write about, set Hamlet in New York City or the midwest. Hamlet himself probably came from the myth of Orestia.