When I look at myself and see how technology has best helped me, I look directly at the move our district made to Gmail a couple of years ago. Google Docs has changed the way I can communicate with my staff members and the way that we can collaborate when it comes to helping kids become better.
We have meeting notes, shared documents, presentations, endless data reports, etc. that is available for whoever you want to see that saves paper and saves time. It's not necessarily anything new, but it has really helped the way that we use technology and communicate in our building.