Docked iPhone 3GS automatically starts or resumes playing/HOW TO STOP

Question

Last year, I brought my iPhone 3GS to an Apple store and presented the problem of docking the iPhone and having the iPod on the iPhone resume or play from the beginning whatever song had last been played on the iPod. I needed to stop that behavior. One of the tech people showed me how to do that (something about hitting HOME button and power on/off button of phone simultaneously or one after the other or something). I've forgotten how to do this! There must be somebody on this forum who knows this secret formula.
It's highly annoying to dock the phone in my car and then have the iPod on the iPhone just automatically start playing whatever was last being played. I do not want it to automatically play anything when docked. Right now, the only way I can sort of do this is to switch to a podcast and force the podcast all the way to the end of the episode and then hit DONE. The way that tech showed me was much more efficient and elegant.
Anybody know how to do this?

Answer 1

The checkmark is used to include or exclude the checked item in the specified action. For example, only songs with a checkmark are imported when you click Import. Or only checked songs are considered by Genius, or synced to a device. However, checking songs does not exclude them from shuffling.
You might find this slightly outdated document useful: http://docs.info.apple.com/article.html?path=iTunesMac/8.0/en/symbols.html