Don't just plunk your iPhone down on the kitchen table where it can be easily knocked on the floor (or have water or food spilled on it), instead make sure it's in a secure location. The easiest method to keep your iPhone from harm's way (and to make sure you don't lose it) is to invest in a dock, and keep it plugged in and kept in a secure location.
The Apple universal dock is one of my favorite accessories to use with my iPhone. It may seem simple but it sure is nice to have a stand up dock for your iPhone. This dock works with not only iPhones but with the iPod too. With a slot for a power cord you can charge your iPhone as well as have it safely sitting up right in a secure dock. It's a little pricey as it runs about $59.