Road Bike Giant brought up an interesting point- Don't stop and then hope to unclip. This is asking to fall, since your foot should be out yards before you stop. Look up the road, you need to be watching at close and far distances at once and know where you're going to stop. My foot is out and off the pedal as I'm scrubbing off speed with the brakes so it's ready to dab when I stop. Even in a maybe situation the foot comes out- slower speed means more reaction and decision making time. Slapping it back into the binding is the easiest part of clipless, so when in doubt pop your foot out. You do this with the brakes in your car all the time without realizing it
A drill you can do toodleing around the neighborhood is to blow both bindings at once, then slap the feet back into the binding WITHOUT LOOKING. Don't stop. just go in and out. The leg learns where the pedal/ binding is at all times really quickly. And yeah, you can alternate one foot at a time or whatever keeps you from getting bored. two or three sessions should do it. The learning curve isn't very steep, it's just that nobody tells women how to learn this stuff. My ex Soviet fencing coach actually came up with this exercise when he saw I was burnt and changing sports for real. He doesn't ride, but he understands how the body learns combinations of movements.
Observe other riders in traffic. You can tell who does it right 'cos it looks easy. You can learn a lot this way.

miss liz