Choose a specific date or day of the week for releasing decisions. Tuesday could be the day that interview invites are sent out and Friday could be the day that post interview decisions are delivered. It really does not matter when or how frequently, that can be up to each school. I have a couple schools I applied to that already do this.
Yeah they just tell you up front that these are the days we make decisions so if you don't get any mail.....well you know how it is. Totally agree that all schools should do this.