The other day I posted ten cool cell phone tricks. The most useful one for me by far has been Jott.com. It is unbeleivably easy and useful. You go to the website. Sign-up. And then call messages in to yourself. So if you're driving or you meet someone on the street and you need to make a note to yourself but have no paper or you haven't made the switch to a PDA, don't. Call Jott and leave yourself a message. You will be emailed both an audio and text reminder. It's beautiful and it's free.