Just in case you haven't done it in a while, or have never done it, tell the priests you know "thank you." A simple thank you for their unconditional yes will probably do, but I'm sure we can all extend a special sense of gratitude for particular aspects of their priestly ministry.
Personally I try to regularly thank Priests after they offer the Sacrifice of the Mass, and always thank them after hearing my confession. Think about it, had they not said yes to God's call, how different would your life be?
May God continue to bless all our Priests abundantly for their heroic lives of virtue and sacrifice!