Natural disasters humble us as a species. They serve as reminders that for all our technological prowess, the natural world packs a far more powerful punch. Less arrogance and more humility is a reasonable response to these kinds of reminders. A good place to start might be to reconsider the siting of nuclear plants in light of potential catastrophes, as argued in this perspective, t r u t h o u t - Russell D. Hoffman | Tsunamis and Nuclear Power Plants.
For a list of relief agencies helping tsunami victims, follow this link.