One of the very first projects I had to work on as I entered college was a technological solution that improved human behavior around high-usage of non-renewable electricity.
I came up with the world's most average and obvious idea. It was a system that constantly measured office energy utilization and caught deviations from normal. And it suggested targets to meet to comparable office environments. This kind of a data point is pretty common in utility billing for behavior change today. So while I didn't have anything dramatically unique or interesting, I don't feel terrible because it seems like I was on the right track.
Today, I don't believe a whole lot of change on an individual level can make the difference as technological innovation in power generation can.