Re: Rosetta Stone
I've been using it to learn Mandarin. It's good, but I do wish I had some formal understanding of the structure of the language.
I think it would actually work pretty well with Spanish since you basically just need to learn vocab and tense.
Games are won on run differential -- scoring more than your opponent. Runs are runs, scored or prevented they all count the same. Worry about scoring more and allowing fewer, not which positions contribute to which side of the equation or how "consistent" you are at your current level of performance.