JUNGE OPERNCARD
If you're under 30, like going to the opera but would rather not go alone; if you'd like a good seat but can’t afford to pay a lot then a Junge OpernCard is just what you need. You can buy one HERE (is activated next day) for €10 and valid for a year. Tickets are only available from the box office, not online, and can be booked in advance. If you feel like seeing an opera then come to the evening box office on the evening of the performance, present your card and you and your companion (who must also be under 30) will be given the best available seats in category III for €15. You can't use your card for first nights of new productions, the performance on New Year’s Eve and some special events.
Existing Junior Cards remain valid for the year you've paid for.