Mobile Phone Etiquette...Common Sense Tips

So, you're at the grocery store picking through the apple bin.  Someone comes and stands next to you.  They say hello.  You turn and say "hi" with a big smile on your face.  Only to realize that they have one of those dang earphones hanging off the side of their face, and their conversation is not with you!
I am just as guilty as the next person in believing that a particular conversation I'm having in public cannot wait until I get someplace more private.  I have kids and family that think the world is going to fall apart unless I can give them permission to watch TV or settle an argument or help them figure out what to have for dinner.  I understand it, but I don't like it.  I mean, it wasn't that long ago that we didn't have a way to keep in touch with EVERYONE 24/7.  And we survived!
Really, I think I'm just asking for common sense when using a phone in public.

• Make it obvious that you're talking on a phone to avoid those ebarrassing encounters with people standing around you.
• Keep your volume at an acceptable level.  You don't have to talk any louder than you normally would.
• Watch the language and content.  You are in a public place, with the possibility that there are little ears present.  And even if there's not, I don't want to hear about every detail of your drunken brawl, or your encounter with Charlie Sheen!
• If you're in someone else's company, keep it short.  There's nothing more boring than eating dinner with someone who's focused on someone else.