Re: those various sites, I would caution anyone who doesn't want to be spoiled to tread lightly. The ones that are more focused on the show are safe, but the ones for the books are not. Just check first before you get too far into it. There are great things coming up and I'd hate for someone to be spoiled when they didn't want to be!
I held my tongue about the final episode last season because I didn't want to ruin it for several of my friends who hadn't read the books. They thanked me afterward. I remember how I felt when I finished book 1 and kept seeing that final scene in my head. I didn't want to take that moment of surprise away from them.