Cohabitation before marriage is often viewed in two ways. On one side, couples say that it can lower their odds of divorce: If the cohabitation goes poorly, the couple knows they should not get married. On the other side, there are those who claim that living together...

Having a prenuptial agreement should give you some sense of security as you head toward divorce. That agreement already defines a lot of the terms of the divorce. It may state how assets should be divided, which assets count as separate property and things of this...