Best advice I ever got here at TE was about clipping in and out of pedals.

And subsequently I share everytime the topic comes up and no-one has beaten me to it.

Riding clipped into pedals is easy as long as you remember TWO things... yep, only two.

1. Always unclip with the same foot (doesn't work so well for off-roaders, but if you are a roadie, you can do this). If you train your mind/foot to always unclip on the same side, in an emergancy/quick stop, your muscle memory will do what you expect to do.

2. Turn your front wheel away from the foot you unclip. Your bike will always lean toward you and your foot will reach the ground before the rest of your body.