There's no better way to spread appreciation of science than inviting people to participate. A recent post from the U.S. Geological Survey, "Scientists Need Your Eyes and Ears," presents several different projects that allow civilians to collect data. Some of them I've featured here before:
If you're on Twitter and feel an earthquake, just tweet "earthquake!" (or "terremoto!" if you like), and the USGS's Tweet Earthquake Dispatch program will pick it up, along with everyone else's, and instantly map out the shaking before the seismic waves even reach the world instrumental network.
Alaskans, who live in America's most volcanic state, can report their observations of ashfall at the Is Ash Falling? site.
You can also contribute to the National Map and report observations of annual biological events through the Nature's Notebook program.