On a recent trip out of town, while waiting in the Phoenix airport to board my flight, I suddenly become aware that I had really used a lot of apps on my iPhone that morning. So I counted the ones I had used – all 15 of them – before 10am.

1. Mail
2. Phone
3. iPod
4. Safari
5. Messages
6. Calendar
7. Toodledo
8. Evernote
9. Tweetie
10. Facebook
11. Brightkite
12. Livestrong
13. AP Mobile
14. Weather Channel
15. Tripit

I went on to use some more apps later in the day, but this all goes to prove that the iPhone has become an indispensible part of my life – helping me be more productive, connected and responsive to the people in my life.

What apps are a critical part of your everyday life?