5. The grinding of my coffeemaker in the morning.
4. A tennis ball being thwacked by a racket.
3. The crickets chirping late at night on a calm, summer evening. (one of the things I miss most about growing up in a small town)
2. My cat's soft purring.
1. My son's newest kick: an imitation of a fire truck siren ("WEE-lo, WEE-lo, WEE-lo, WEE-lo"... ), which he says over and over again, slowly and under his breath, as he is falling asleep in his crib.