The main thing that has always made me reluctant to add another language to those I've already started is that, with work, a brood of rambunctious offspring, etc., the amount of time I have to throw at language learning tends to be limited. Well, what with me getting all gung-ho on Korean lately…
I thought it was time that I came up with some kind of systematic way to continue growing my vocab in the languages that I'm not really focusing on at the moment. Given my time restrictions, the system would have to work with a minimum amount of time but pack the strongest punch possible in that time.
I know that Susanna Zaraysky would approve when I decided that music was the answer.