If you intend traveling by train between Vienna and Salzburg (or between any other places along this railway line such as Vienna-Linz or Linz-Salzburg), then you might be interested in this X-Mas special offered by WESTBAHN (www.westbahn.at):
Validity: until January 5th, 2014
Allowed days: No restrictions
Ticket prices: from € 9.90 (e.g. Salzburg-Linz) to € 18.90 (Vienna-Salzburg)
Ticket sale: https:/… or in Trafik Stores (=stores selling newspapers, magazines, tobacco)
*...Online ticket purchase is a little tricky as they do not offer any booking site for this special ticket in English, only their main products can be bought in the English version easily. But it is easy and painless if you follow my instructions:
1. Go to website: https:/…
2. Select your connection in "Wählen Sie die gewünschte Verbindung"
3. Select the number of adult travelers in "Wählen Sie die Anzahl Ihrer Tickets"
4. Choose "Zur Kassa" what means "check-out"
5. Now change to English by clicking the british flag
6. Finalize the purchase