I traveled around Europe for a month recently with my phone in airplane mode the whole time (except when needing to call a taxi at 3:30am in Venice, Italy). In the first week I also found myself doing this.

As long as technological progress continues improving, we will unintentionally (and intentionally) make things more addictive than before. The same process that drives good technological progress also drives bad technological progress.

Paul Graham's essay on this (http://www.paulgraham.com/addiction.html).