As an added bonus, the above technique can minimize the effects of an abrupt throttle response or excessive engine braking. If you're not modulating your speed with the throttle, you won't have to worry as much about either characteristic, letting you concentrate more on corner speed or what's coming up around the turn. One thing to mind in all this: rolling on an excessive amount of throttle but keeping the brake on will quickly wear the pads out, and give you a surprise when you do let the brake off and your bike leaps forward.
Using the rear brake even...
Using the rear brake even slightly in a hard stop will help settle the chassis and add stability.
In general, the less traction that is available the more rear brake you can-and should-use. On a slippery surface the front brake will lock well before much weight can transfer to the front tire; ergo, there is plenty of weight left on the rear tire for traction and you should use that to your advantage. Again, use care as the rear wheel-just like the front-will lock earlier on wet pavement than on dry, and overall you'll still have less braking power available.
Finally, downhill corner entries pose a bit of a conundrum. Here there is more than usual weight transfer to the front wheel under braking, leaving the rear brake less useful. However, this situation is exactly where you want the extra stability it can offer. Adding even a small amount of rear brake can make a beneficial difference to how the bike reacts downhill, to the point that at times it may be worth sacrificing some front brake so that you can use more rear. Experiment here with different combinations to find what works best for you and your bike.
Most importantly, don't simply ignore the rear brake-whether because you think it takes too much concentration or you're worried about it locking. It may take some practice to fully utilize it properly, but that practice will come in handy some day. All that said, try not to rely on it excessively. It's more a tool to finely adjust your speed and help settle the chassis than just a stopping device.