http://www.zompist.com/whylang.html
This is an excellent article about learning languages and why we fail. The gist of it is, that if you're not in a situation where you MUST use the language, chances are you won't learn it.
It has some good tips all throughout with some sobering realizations. The last paragraph was a sucker punch for me.
>If a language is used only at home, be aware that the children will learn only an impoverished form of it– possibly to their surprise, if they go to college and take courses in it, expecting an easy A. A high-school friend of mine was German but grew up in the States; returning to Germany, she was embarrassed to find that her written German was terrible. Similarly, my wife, who was educated in Peru, is always distressed at the low quality of the Spanish produced by Hispanics who've grown up here. (I know a linguist whose reaction was, "But they're still native speakers." Sure, but they have a lousy command of the written standard.)
So much for my ego. In light of this, I'm going to try to perfect my spanish. I can speak it natively but my reading and writing of it is borderline illiterate. I think for me this would be the smartest choice as I rather know a second language well that 3-4 languages mediocre 2 of which I may never use IRL. Plus, I get access to spanish imageboards, shit's p nice.
So what about you, what do you think about languages?
If you live in the US though, I honestly think learning programming or bettering your math is much better to know.