Andy Pandy said:My pompino has both a front and back brake. However, under hard braking, in my experience, the back brake simply locks the back wheel. I'm not sure that this actually helps in stopping. If you are trying to brake and maneuver (say to miss the rear end of a car that stopped in front of you) locking your back wheel doesn't help. I try to avoid using the back brake, but can't help myself in an emergency.
Sounds like you've learned, and are practicing, poor technique. (This is stated as constructive criticism, not a p*ss take.) Get out of the habit of grabbing the back brake; you don't want to grab the front brake fully on though

In general do 75% braking with the front and 25% braking with the back. This is what they teach you when learning to ride a motorbike. Also apply the front just before applying the rear and apply the brakes progressively, don't snatch at them.
In the dry you can use more front brake, in the wet/icy conditions you'll probably want to use the more back brake but always use both.
Also put your weight back as far as you can on the saddle, this will help keep the rear tyre firmly on the road and let it contribute to the braking rather than snaking around.