Game of Thrones is done for roughly the next 10 months, sadly. On the bright side, you can use the off-season to travel to all the places that the show is filmed—assuming you, die-hard fan that you are, haven't already done so. Hopper, a Boston and Montreal-based travel planning site, has done most of the hard work for you, putting together a detailed map of the major GoT filming locations.
The site also breaks down the destinations by both season and house (Lannister, Stark, Targaryen, etc.), so it won't be too difficult to pledge allegiance to a particular one. Or you can just pull a Littlefinger and pick and choose whatever suits your desires at that particular moment.
The vast majority of production takes place in Europe (Ireland, Iceland and Croatia are three of the more popular settings), but Morocco in northern Africa has also played host to some of Daenerys Targaryen's conquered cities. This won't come as a particular shock to fans of the show, but the destinations cut a fairly wide swath of climates and terrains, so if you can find the time (and money) to tour all of them before Season 5 kicks off next spring, there's little chance you'll get bored.