I LOVE the one-foot pedaling tip. I'm going to do this for the 2 miles in/out of my neighborhood I warm up/cool down through every ride.
It was only about 3 months ago when riding with a friend (who did a lot of Velodrome)when I started pedaling mostly "correctly". He was like, "Hey man....why aren't your feet flat?" "Uh....you're supposed to do that?"
I almost exclusively ride alone, and soak up tips that will help in the long run like a sponge. I'd always thought I had the "circular motion"/pedal stroke down pretty well, until the whole "flat foot" tip came in to play and I had to start using a whole new (ie - correct) set of muscles. But it is helping! (yesterday the wind would have normally kicked my ass on the way home...i powered through like a champ)