We may joke about the commissary being crazy busy on payday, but the real reason for the long lines is no laughing matter: Some families are only able to shop for groceries on a payday. Many military families are in strained financial situations, especially if they married young and the spouse has never held a full-time job. Since the military is paid every two weeks, some couples take drastic measures to make the money last. For a checklist of questions you should ask yourself about your family's financial situation, and how you can avoid issues, see this Spousebuzz post.