Initially in school and listening to The Smiths and then I moved to Australia when I was 17, then went to University there, and by the 3rd year I was speaking it really fluently. It took about 4 years of speaking it all the time to start dreaming in English, but at least 10 years before I started doing math in my head in English (they say this is a true indication of how well you speak a language). I used to be very fluent in Russian, but as I started speaking English on daily basis, it literally replaced Russian. So now I understand it quite well still, but I just can't get any words out. Weird But if I went to russia for like a year, I think it would come back.
Nope, my parents sound horrible when they try to speak English. I just watched a lot of tv when I was a kid. I even freaked my mum as a really small child, maybe 4-5 when I once asked her if the person on the tv said [insert here] and she looked at me and just stared because that was exactly what the person had said in Dallas or whatever show it was. I lost that when I got a bit older and started learning English but then I watched a lot of Cartoon networks and MTV and that was before they subtitled or dubbed it.
min familj har alltid haft mycket gäster från hela omvärlden, speciellt USA redan när jag var typ två, så det har alltid funnits runt mig. Sedan så älskar jag brittiska deckare och att läsa så när ungdoms avdelningen på biblioteket var förliten så övergick jag till engelska där med XD
Good luck! I can speak English and I could speak Italian and German before (now I just remembers here and there since I didn't keep it up) and of course my native language (Swedish, just like yours I am assuming).
The more languages you know the more you see how similar they are and how words are similar even if they don't come from the same linguistic branch (but then again we all come from the same tree).
The computer. Even before we had internet, we had so many of these silly games teaching english words. So I spent pretty much my entire childhood playing them. By the time I went to school and started studying it, I only learned two new words during the first year