Wake me up before you go go

I've been using my cell phone as my alarm this since summer. I found toward the end of this last semester that I'd had enough. The limited number of ring tones that came with my most recent phone were incredibly annoying and even caused some anxiety. I didn't want to start my day out that way anymore. I decided to go back to what had worked for years and years prior: an inexpensive alarm clock. I picked one up the next time I was at Target.
The first night I used it, I set my cell phone alarm just in case. I wondered which would be more effective at waking me up.

(Not actual alarm clock purchased, but it would've been had it been available.)

Which was more effective? Neither.
What did get me up and out of bed? The unignorable and unsuppressable (two words that I'm not sure exist) urge to urinate. Now if I could only figure out how to make that happen every morning, I'd never be late for anything again.