Color correction dilemma

So I run into this problem a lot, and maybe others do too: I never feel like I'm getting my white balance quite right. Usually I tend to go a little too warm...



Or at least generally can't decide in which direction to lean...Weddings seem particularly difficult.







Also, all of these look so much better against black than against white. Frank, it's been a long time since your intro to digital class, what should I be aiming for? I think the room I'm editing is too bright too. Also trying to decide if it's worth getting a monitor calibration device. So many things to think about!