I am actually riding platform pedals until I get used to my new bike, and also get a little more coordinated after a long break... However I have a few hundred miles on clipless, and I know the secret, at least for me.
If you are like me I have one suggestion.
Never, ever ride where others acan see you.
I have three clipless falls. All of them were during organized rides when others were watching.
Fall #1... During the Lancaster Covered Bridges Metric, I got to the top of the biggest climb of the ride. The other riders told me about the top. There is a family that offers water to the riders, and also (if desired) a spritz with the hose. So, as I crested the top of the hill and came to a stop, I felt like a real moron when I fell over, still clipped into the bike.
Fall #2... I should have known what the day would hold. At the Livestrong ride in Philadelphia, I hit my shin against the pedal before the ride, as I was pushing the bike across the lawn to the starting area. As I was waiting for the starting time another rider asked me if I knew I was bleeding. I said no and looked down at what looked like dark rose petals on the ground where I had been pacing... When the bleeding was finally stopped by the medic, I went back and started the ride... when I got home I discovered my right shoe was full of blood.
But, that wasn't my clipless incident. After the ride, I pulled up to the bike racks (in a grassy area) to take part in the post-ride meal I came to a stop next to the rack and realized that I was clipped in. I went down (if you must fall clipped in, I highly suggest doing it on a lawn, it is so much easier). As I unclipped and extricated myself from the bike, the medic who fixed my earlier injury walked up and asked me if I was alright.
Fall #3, The Bucks County covered Bridge ride. I was riding with another person that I met in a different forum. We got off the route, and started searching for markers. I rode slowly looking at ths side of the road and saw the road marker for our route. I stopped and started to turn around to call back to Phil that I found the marker. I got his name out as I suddenly realized that I was still clipped in, as I fell to the ground.
I have never fallen while riding clipless unless there were witnesses... therefore I suggest the most isolated routes... go where nobody else ever goes and you will never fall.