A tip that I may not have mentioned:
I run my pedals relatively tight. Obviously, "Tight vs Loose" tension is more relative to the riders strength. What is tight for a 140lb rider will be really loose for a 240lb rider. I once setup pedals for a smaller lady rider at the track. I set them on what I thought was a medium setting...she had to remove her feet from her shoes to get off of the bike, hahaha.
Anyway...
Sometimes, because the pedal is so tight, when I disengage the cleat will actually begin to move on the shoe, twisting a bit which messes up my foot's angle. I've found that if you use skateboard grip tape and adhere it to the bottom of your shoes first, this prevents this from happening. You can probably get scraps from a local skateboard shop for free or close to free.
Some shoes (Like Sidi) come with a patch of 3M grip tape pre-cut in the box. That's where I got the idea.