European train tickets

Heading to Europe this summer? If so, it may be time to book your train tickets. Riding the rails in Europe is the best way to get around. It's affordable, convenient, comfortable and flexible. The first thing you need to decide is whether a train pass or individual tickets makes more sense.
The Eurail pass is valid for trains in the European Union and you can use it as a hop on hop off type pass. So it's very convenient, but it can be expensive if you are not taking a lot of trains.
Individual tickets may make more sense if you just need a few rides. You can buy indivdual tickets 60 days in advance. Be sure to buy through the actual train company and not a reseller.
I priced out tickets from Berlin to Prague. The reseller was selling each seat for more than $100, but if I buy the tickets straight from the train company each ticket will cost me just $25. A huge difference.
The guru for train travel in Europe is Seat61.com