1. The past few decades  
2. The Local Group  
3. H$_2$O megamaser detection surveys  
4. The MCP  
5. A caveat when analyzing 22 GHz H$_2$O maser emission  
6. Other H$_2$O maser lines  
7. 1.7 GHz OH versus 22 GHz H$_2$O  
8. Formaldehyde (H$_2$CO)  
9. Methanol, HC$_3$N, and HCN  
10. The bright future