My wife and I simply never use our cells unless it's an emergency (or at least something of unusual urgency). I still tell people to "write me a letter". But OK, we're retired so I guess that's different from people who need to speak with customers/clients.
But to me, cellphones/etc. seem a lot like electronic leashes. When friends come over, it seems like their kids/spouses/whoever call for no good reason and they feel like they *must* take the call even though it's never anything that needs immediate attention.
As far as taking it with you, I *do* think that's a good idea. It's just like always carrying your [whatever your everyday carry stuff is], and with today's technology allowing you to always have communication capability, well, better to have it and not need it..
DavidB- Good list

I can't for the life of me understand why people think cellphones are immune from the laws of common courtesy
pharmboyrx- Good for you too

I bet few pharmacists are that conscientious.