My native language is Finnish. I started learning English from cartoons at about 5 to 6 years old - many of the kids' shows we had on VHS were subbed, not dubbed. So as I couldn't really read fast enough yet, I just mostly immersed in the cartoons and slowly started to put the words in the subtitles and the spoken language together. Computer games - we had an old black & white Osborne at home which could run a few games - and NES games helped quite a bit too. So when I went to primary school, I already knew the basics of English quite well. I never really bothered to do any homework etc. when we started studying English at school in third grade. But I played through Final Fantasy 7 at fourth or fifth grade, which was probably a lot more impactful than any of the English taught at school
. After primary school I applied to an "international" lower secondary school and attended a class that was taught about equally in English and Finnish, which helped immensely with spoken English. And about at that point we got a broadband connection at home, so I was kind of spending most of my free time in a virtual English environment too, even though I never really thought about it.
I also know Swedish like most Finnish people, albeit far worse than English, because it was never "just there" all the time like English was. It's a compulsory language for us at school, just like English. I took optional German at lower secondary school, but stopped after that, and have forgotten most of it already. Also did one course of Italian at upper secondary school, but the teacher sucked and I decided to drop it.
I've been into studying Japanese for quite a few years now, but only about a year and a half ago got into studying for real, on my own, utilizing the "AJATT method", so to speak. I've been going through Heisig's Remembering the Kanji too, but I'm only at about 500 kanji now, so there's still 1700 to go. This past summer I was for the first time able to converse almost completely in Japanese with a Japanese person, which felt pretty awesome. My studying besides Heisig comprises mostly of watching shows in Japanese without subtitles, and all of that fun stuff. My iPhone is in Japanese, and I use Siri in Japanese. So pretty much what I did naturally with English as a kid. The problem is that I still can't read properly though, which limits my intake of the language quite a bit.
I picked optional Mandarin at school too, which will start in a few weeks. Hopefully I won't be mixing up hanji and kanji too badly.
I'd recommend Antimoon if you're still trying to learn English. It seems like it's basically what inspired AJATT, and for English instead of Japanese. Check it out:
http://www.antimoon.com/