Store the salad in an airtight container in the fridge for up to 5 days. When you serve it again, add more dressing and remix the salad as the orzo absorbs dressing over time.
If the orzo turns mushy, cook it only until al dente and rinse it under cold water immediately after draining.
If the salad seems dry after refrigeration, add more dressing, about a tablespoon at a time, to refresh it before serving.
To maintain the freshness of the herbs, add them right before serving.