have experience riding Amtrak, or long-distance trains in general?

I'm taking the Amtrak to Chicago tomorrow, and I'm just a tad bit nervous because it's easily been at least 10 years since I've taken a train anywhere. Is there anything I should know? The trip is 5 hours each way, so I'm thinking of it being like an airplane ride, except you know, more on the ground. I'm loading up my iPod as we speak. TIA.