While Mists of Pandaria is still actively being developed and patches are dropping regularly, the rogue of tomorrow is starting to take its final shape. The amorphous blob of shadow that we see on the horizon is congealing into something resembling a functioning class. In fact, rogues have been receiving fewer changes these past few weeks than any other class. I'm not surprised by this fact, as there's really not much to improve upon when we're already a model class.
With talent choices reduced to a half-dozen easy decisions, there's really not much you can mess up while playing your rogue in Mists. I like to think that you can break a class down into three basic categories: customization, enhancement, and execution. You need to pick the talents and glyphs that best suit your situation, gear up with the right gems and enchants, and finally push the right buttons.