I second the recommendation to loosen the tension and to unclip before you actually have to stop. My first ride with my Keo's was a little scary because I hadn't backed the tension off enough and had a heck of a time getting unclipped. Can you say panic? I only unclip with one foot--always my left-- however, when I stop.
Notwithstanding that scare, I promise you that with some practice, using the pedals will become second nature to you. I had a proud moment last week that speaks to just that. I was on a group recovery ride when a wasp/bee/hornet flew into my helmet and stung me. Realizing what was happening, I calmly pulled aside from the group, stopped and remembered to unclip as usual before ripping the helmet off my head and freeing whatever horrible little creature was stinging me.
Once you get used to them, you'll wonder why anyone rides without them. They are so helpful in getting a smooth pedal stroke and in climbing. One other thing that I found really helpful. After I bought my bike, I took it to a professional fitter to dial in my fit. Cleat posititioning was included in the price. It was well worth the money.....
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher