Do you ever do trail riding? I found off road riding really makes you learn to use your front and rear brakes together. I recently took someone off road for the first time (she had done many rides on road, gravel, dirt road) and one of her first comments after going about a mile was she realized how important the front brake was. She never used it on the road, wasn't even used to having to grab it with her had, but off road, she just couldn't get the power from her rear brake going down hills. It really forced her to learn to use her front and rear brakes together. Try off road riding, it helps with handling and you'll quickly learn the importance of both brakes.