I'll tell you right away the sooner you start looking for tickets, the more likely it is to find access for a promotion or with a discount. I'm talking about finding a key on the official website. You may not find such good options at the ticket offices half an hour before the train departs. Rule two: don't rush to buy a regular standard fare ticket. In Germany, there are several lands and combined tickets that will significantly save your costs. And if you decide to go on a trip, check out all the information and schedule in advance on the website
oebbfahrplan.com.