Now I’m not suggesting to check body temperature often. I am talking about checking the temperature of the relationship.
I think it is a good idea to know on a day to day basis how the relationship is moving(hotter or colder). Plus it is a good idea to prepare quickly if the temperature is going down. I think it goes without saying, the sooner you work on improving your marriage the easier it will be.
If you wait until you realize the relationship is damaged it will be hard or next to impossible to improve your marriage.