You've got a nice WPM, it'll take me a while just to get a WPM of over 100.

I realized I truly knew how to type when I could be looking at a document for reference while typing something different, realize I'd made a mistake without looking, and fix it, all while continuing to study a totally different document. Only once you've reached this point, where you average 95% accuracy with little effort, is it time to train speed.

Even still, I find my best results come when I focus first on the accuracy of my keystrokes, second on the speed of my fingers striking the keys. Accuracy births speed, speed births efficiency.