Take a perek of tehillim that you want the chasson and kallah to emulate and write a hashkafic dvar Torah on it with a lesson that applies then and applies now and in the future. That is what I would do.
in the taam v’daas, from r’ moshe shternbuch. in this week’s parsha. he has two pieces on ?? ?????? ??? ?? ??? have a look at the 2nd of the two pieces