A few days ago I switched my phone alarm from the god-awful rooster ringtone to this ringtone:
The difference it has made in my morning, nay, life is indescribable. Now I wake up singing along to my alarm instead of resisting the urge to ferociously fling my phone against the wall.
Side note: Have you ever used one of your favorite songs as an alarm, only to have it eventually be ruined for all eternity because now you can never hear it without your brain automatically trying to jolt you awake even though it's only three in the afternoon? I made that mistake with a few different songs last year. Never again.