Unfortunately I don't have any great tips re that BCG... I used to be like you when I started nursing, taking all the problems of the day home with me. So much so, that it started affecting my outside life, and it didn't help that my partner at the time (later my wife) was ALSO in the job.....we tended to talk about work or work-related stuff all the time.
Eventually we made a decision to NOT talk about it, unless there was something funny/amusing to say (there almost always is!) and now I can "leave it at the door" on the way out!

My current patner, celticangel, is a nurse also.... we try not to talk about work-stuff, and by & large are successful at that... I guess it comes with experience, and realising you can only DO anything when you're actually there.... you owe it to yourself and your family/friends to live the rest of your life, outside of work, the way YOU want, either out enjoying yourself, or here, perving!!!

DM

__________________
The selfish, they're all standing in line
Faithing and hoping to buy themselves time
Me, I figure as each breath goes by
I only own my mind