This is a tough question that faces many couples during their marriage. There are many issues to consider and it is not always easy to find helpful advice. Alan Hawkins and his colleagues from Brigham Young University have written a very thoughtful guide to help couples think through this process.
They include helpful activities that either (or both) partners can do to get a realistic assessment of where they are. Hawkins and colleagues also provide information about the effects of divorce on children and adults.
This is a valuable resource for couples.