What is the deal with the USA Rail Pass? How about the North America Rail Pass?

How are Amtrak trips priced? Is the price I get when I use the Amtrak site a per person price or the total cost of the trip? How are sleepers prices?

I am taking my first long distance train trip. What do I bring and how should I pack?

A Reader Contribution: Our Family Train Trip Down the Coast

What is the Amtrak Service Guarantee? When should I ask for a Service Guarantee Certificate?

Should I tip on Amtrak? If so, to who and how much?