Except I've recently found a more efficient variation on this e-mail-yourself-a-note approach to personal reminders.
Scribbly is a tiny note-taking app that send e-mail on demand. It's a nifty, light-weight little app; it lives in your System Tray, awaiting a note. You can type anything you like or paste in information from other sources (like URLs, for example) and then e-mail it to a pre-configured e-mail account with a single click.
If you often need to send yourself notes, give Scribbly a try. It's an Adobe Air app, which means it runs anywhere Adobe Air does -- Windows, Mac, and Linux. And it's free.