I've been more of a lurker here at the knot and reading all these forums has helped me with my wedding planning. I didn't agree with everything, but I will say the one piece of advice that I should have taken was about choosing your MOH and bridesmaids.
Choose wisely. Go with your gut. If you have had problems in the past with a certain friend/family member, no matter how long you have been friends or how close you were in the past, chances are you will have a problem during the wedding or another important event. I kept seeing the comments about the only expectation you can have for a bridesmaid is to show up in the dress sober. Well, my MOH showed up....but I wish she wouldn't have.
CHOOSE WISELY MY FRIENDS!