Everything everyone has said is very helpful - I've only been riding a little while too, but I have fallen while clipped 6 times! Always when coming to a stop, always because I get flustered or distracted. I was unclipping right and falling left, without fail.

So what I have been doing the last 2 months is unclipping both feet any time I see anything worrisome - dogs, kids on bikes, traffiic - whatever - as well as when approaching stop signs and traffic lights. So the unclipping has become part of my "stay alert - pay attention" mode. It sems to have helped - I think my last fall was about 8 weeks ago (did I just jinx myself?)

I'm confused about the wheel turn thing (in spite of the great descriptions by skinke and cmac!), so I'm just going to stick with my unclip-alert mode. I'm hoping overtime I'll need to unclip less frequently. I also keep neosporin and big bandaids in my tool bag!