I've gone back to the first episodes (for the grammar in particular) and am trying to work my way from there back to the present. I hope to catch up in a month or so. I was surprised at how useful the quizzes are -- I hate quizzes! -- but these are extremely good practice. I usually have to work through them more than once to get rid of all the red markup.
My favorite section is Explorando America Latina. I find that now when I listen to BBC's Mundo Hoy, I can follow far more than I could before. I plan to begin volunteering with the Florida Literacy Coalition, working with Spanish-speaking people here.