Of course, not every marriage survives. Not that a regular anniversary trip is the key. But careful consideration of your partner and your relationship and treating your marriage as the most important thing in your family certainly does, IMO. It's the foundation all else rests upon.
And in this case, I was responding to the comment that "we'll have plenty of time to get away once the kids are grown." That's a pretty big assumption, actually. Maybe you will, but 20 plus years is a long time and a lot can happen.
It was actually a James Dobson marriage book I was quoting from, which was oddly enough in our room at our getaway last weekend (The only book there besides the Bible). I don't care for the whole Focus on the Family angle but I was surprised when I picked it up how he talked about how little people consider the ramifications of their decisions in marriage.
And Dobson actually used the example that he counseled couples that if they had 3 children 3 years apart, it would be 27 years of having child-rearing responsibilities. And almost no couple he counseled had considered that fact, and they were all astonished by it, which surprised him.
And then I put book down on got on with the anniversary celebration. But he PP's comment made me think of it.