And at least from my perspective, cell phones are only making this truer given that you get interrupted wherever you are and whatever you're doing. In my case, that means I basically just give my cell phone number to people I want to be able to reach me. Everyone else gets a work or home landline number. And good luck reaching me on one of those--especially if I don't recognize the caller ID. I don't even check messages when traveling. (I do still maintain a landline primarily because I sometimes need to make high quality calls for business purposes--and other options aren't as reliable.)