I haven't personally used LingQ, but it seems to be the best way to pick up new languages. It provides a feed of news in other languages with a neat vocab tracker! I haven't learned a language with it yet, but I'm very interested. There's also an excellent interview with LingQ's creator.
Just tried it out-- it's a neat concept. I wish the "free" version was more giving... I'll have to try more to see if it's something I'd want to pay for. Overall, it seems fairly useful.
Following up-- for anyone that wants to try it, if you use a referral link (plenty on Youtube if you look for lingq reviews) you can get like 120 lingqs upon signing up. That's a much better trial.