You've already done one of the most important parts: move somewhere where that language is spoken. Next: get everyone around you to speak German to you, and speak German to them (obviously, ask when you don't understand or need a term). Instruct them to always correct you, and when they do, repeat the correct sentence a few times out loud. Watch television. Read. Socialise with locals, not expats. Look up or ask about anything you don't understand. The idea is total immersion.

By the way, if you need techy reading material in German, Heise are great. I've been a subscriber to their c't magazine for years.