When I was 18, just finishing gymnasium, I had the possibility to have a one day session at the Career Consulting Centre. This organization gives advice on your carrier options best suited for your talents and ambitions. They run you through different tests, some IQ-ones, some psychological ones. Once this is finished and you receive your career advice you can even include that document with your university application.
Although I had a pretty good idea where I was going, I still visited the Career Center, just so that they re-confirm my decision.