Well I have read the books, but I never read further than the TV show is. Anything I propose for the future is a guess.
Isn't this impossible considering how much the show jumps around? Had a friend book reader tell me that some of the stories are already at the end of the books.
Not really. The chapters are defined by which character's POV/story is being told. So if, for instance, I get to a chapter titled "Tyrion" and in the book I've already read everything that Tyrion has done on the show, I simply stop reading, wait a few weeks, and then pick back up.
As an example, I just this week read the chapter about the Wildling attack on the Wall (this week's episode). Now, there are events from the show that haven't happened from the book yet. For instance, at this point in the book Oberyn just told Tyrion he'd be his champion. Obviously I know how that ends but nothing FROM THE BOOK has spoiled anything from the show. What your friend described is exactly that...the show can ruin the books in some regard, but following my method it will not be the other way around.
Make sense?