That's the ticket - don't be afraid to make mistakes. I remember saying stuff and thinking that W would never speak to me again - I'd sweat it for 2 days, and she'd call with a funny joke like nothing ever happened.
I make it a point to apologize immediately if I'm unfair or wrong as well - and that goes a long ways, plus it takes away any ammo from the WAS to try to use against you - they are scrambling for ways to justify their actions.