I suppose one of the issues I had in making this thread was whether reading, at an advanced level, is enough on its own to keep a language alive and to maintain listening comprehension. This is where I thought audio books would come in: one could expand one's vocabulary indefinitely by means of literature, all the while improving and maintaining aural contact with the language. This is based on the assumption that listening comprehension is harder, or at least takes longer, to build and maintain than mere reading abilities (with the important exception of such languages as Chinese and Japanese). At least that has been the case with me. If I can read French literature reasonably well, my listening comprehension is almost certainly a notch below. This is why I've considered "ditching" (at least for the time being) the written word and engaging with the spoken word to keep the language alive in my head.