Any tips to language learning?

I currently just started to learn German, so far I only have duolingo. I HATE Rosetta Stone, I've tried it with Arabic when I took it in college, it was of zero help. With that said, are there any tips anyone would recommend in aiding learning a language? I preferably would like input from someone who is fluent in a 2nd language. I've always heard watching TV or radio in the chosen language you wish to learn, but how does it help if you dont understand any of it?
Any tips to language learning?
10
18
Add Opinion