Here some suggestions, hope it helps, but bear in mind that everybody is different and that the Camino provides for everybody differently. So, perhaps not to plan too much and going with the flow would be my best tip. As for the others:
Roncesvalles: Pilgrim Mass and blessing plus meeting your fellow pilgrims, often for the first time, over the pilgrim's menu.
Burguette: Ernest Hemingway stayed here frequently, perhaps just sitting in a bar and reading one of his stories for a bit?
Zubiri: Puente de la Rabia (rabies Bridge), in medieval times people believed that leading animals under the bridge would cure them from / prevent rabies. A good moment to be thankful for the achievements of modern medicine.
Trinidad de Arre: Parish refuge directly at the bridge, mass and morning prayer.
Cizur Menor: The albergue of the Order of Malta, common meals.
Eunate: A little detour as it is on the Camino de Navarra, but worthwhile even if the church could be closed.
Puente la Reina: Iglesia del Crucifijo near the parish refuge.
Estella: Albergue Anfas
http://www.albergueanfas.org/en_inicio.php?tipo=1&id=2
Irache Monastery: The Wine Fountain ;-)
Los Arcos: Pilgrim Mass and Blessing
Torres del Rio: The octagonal Templar Church.
Viana: Parish refuge with shared meals and pilgrims prayer.
Logrono: Celebrating life in the Calle Laurel with tapas and Rioja wine ;-)
Buen Camino, SY