To the OP. I'm new to clipless pedals as well. I've have a couple of falls when stopping at intersections as well (been using them almost 1 1/2 months). I've ridden around my neighborhood and just unclipped and clipped...pretending I'm at a stop sign. Someone here suggested "PedalDabs" which I've purchased on Amazon. They work pretty well. I use them for short rides or when riding with my wife because it's usually a much slower and more casual ride.

Here is a link to the pedaldabs site : PedalDabs Platforms for Clipless ShimanoŽ 2014 SPD-SLŽ Pedals | bikedabs

I'm intrigued by the Shimano Click-R pedals mentioned above. They are suppose to be much easier to unclip from.