1. Set-up: Almost all phones allow you to choose what kind of alarm noise or music you use for the alarm settings. You can choose vibration settings as well. There are usually a few different ones to choose from.
2. Placement: The logical place for your cell phone is a side table right next your bed, preferably on your side of the bed. The phone should be completely charged up and out of its case so that when it vibrates it creates a bit of extra noise.
4. Rest: We've found that if we don't sleep enough, vibrating alarms don't get us up, but if we sleep between 6 and 10 hours, we have no problems being awoken by vibrating alarms. Humans follow a circadian rhythm, so we tend to awake in the mornings. However, if you get only a few hours of sleep a night, vibrating alarms won't get you up.
5. Testing: If you follow a normal routine and wake up every morning, you'll probably end up awakening a few minutes before your alarm sounds, whether it vibrates or if it emits sounds. Whatever the case, this might allow you to train mental alarms and not need alarm clocks to wake up at all.
(Images: Flickr member Michael Gilliam licensed for use under Creative Commons, Flickr member Kevin Schneider licensed for use under Creative Commons and Flickr member Patricil Complex licensed for use under Creative Commons)