Reservation of Jurisdiction

To me, the reservation of jurisdiction on an issue is not used enough.  This can be important on issues of alimony in particular.  In almost every jurisdiction in the country, if no alimony is awarded in the initial divorce, one cannot obtain it later.  This may be an important issue if a spouse has significant health issues.  A reservation of jurisdiction or an award of a nominal amount will reserve the issue if there are changes in circumstances.