How do I stop translating word-for-word and start thinking in Norwegian?

I'm a fairly advanced reader, but whenever I try to speak Norwegian during my weekly sessions, I hit a massive wall and freeze. I'm currently using Chickytutor.com to simulate real-time conversations so I can get comfortable with spontaneous output and error correction without the pressure of a human staring at me, but I'm wondering if anyone else has a specific technique for bypassing the mental translation phase?