Shopping – one is permitted to buy food for their child going to school, or for their wife, if they will not be able to do so after Davening. On Erev Shabbos as well, it is permitted if one will not be able to purchase this item after Davening ( if he can do it after Davening it is prohibited even if one has a set Minyan that he attends). In a scenerio that one is permitted to shop before Davening, they should recite the Brachos beforehand.