Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)
I use the silent switch to silence my phone completely (no vibrate). I flip it before I go to sleep. When I wake up, I turn the sound on.
I also mute it at the movies.