Crankin, you don't have to understand all the Spanish on the TV or radio to get benefit from it. Just listening to the cadence and rhythm of the language is incredibly useful. I would encourage you to reconsider not listening to Spanish TV or radio because you don't understand everything. Just go with it and have it on a little every day. It's particularly useful if you are learning European Spanish with Rosetta Stone and want to also get a sense of Mexican and Central American Spanish (which is what most of the TV/Radio stations tend towards, at least around here.)

I found Rosetta Stone (Portuguese) to be very useful with the pronunciation. But I still needed the grammatical rules since I already speak French; it just makes more sense to me. So I took some private lessons and studied out of a book in addition to Rosetta Stone. That's what I'm going to do with Spanish starting in January, too.